V2301 Anti-lock Brake System (ABS) & Advanced Driver Assistance System (ADAS) Recalibration – 2022-2023 Isuzu NQR, NRR

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Document ID: 5032-5887 Repair Instructions Stereo Camera Programming The following procedure was intended to be performed indoors. If your circumstances do not allow you to program the Stereo Camera Programming indoors, an alternative, outdoor procedure is available. However, this indoor procedure is preferable. This procedure will instruct you how to program the ADAS Stereo Camera by establishing the centerline of the vehicle, determining the amount of offset of the Stereo Camera, properly positioning the Stereo Camera Target parallel to the front of the vehicle, and completing the procedure by entering three measurements taken during the procedure into IDSS. Carefully read the following procedure before performing it. Then, perform all the steps in order and exactly as written. Important: • The scan tool used for this procedure must be the same from start to finish. If the scan tool is changed midway, the procedure will fail. • Do NOT touch the camera lenses. • The vehicle should be unloaded (no cargo) and no one should be in the vehicle while performing this procedure. Use IDSS from outside the driver’s door. • Use masking tape on the floor to mark on to avoid permanently marking the floor. • Be sure the tires installed on the vehicle are all the same size and meet the original manufactured specification. Tire sizes other than the OEM specification may cause the ADAS system to not function properly. Do not program the ADAS Stereo Camera until the correct tires are installed on the vehicle. • Due to the time requirements of programming, it is recommended that an external power source be used to maintain system voltage. Stable battery voltage is critical during programming. Any fluctuation, spiking, over voltage or loss of voltage will interrupt programming. To ensure trouble-free programming, it is recommended to use one of the following external power sources: o A Midtronic PCS charger o A fully charged 12V jumper or booster pack disconnected from the AC voltage supply Special Tools and Supplies • J-53207 Laser Measuring Tool • J-53325 Cross-line Laser Level • GE-53292 Plumb Bob/ Twisted Link Set (2 included) • GE-53206 Stereo Camera Target • GE-53291 Target Stand NOTE: All measurements taken and input in this procedure MUST be in metric units (e.g., millimeters). 1. Ensure the Vehicle is not loaded. Position the vehicle on a flat, even, hard, and level surface. Ensure that there is at least 8.0 Meters (26.5 feet) of flat, even, hard, and level surface directly in front of the vehicle. This area must be clear of all objects (shop equipment, poles, other vehicles, etc.) at least 2 meters (6.5 feet) from each side of the centerline of the front of the vehicle. (See Figure 1.) Ensure the parking brake is set. 2. Ensure that the windshield is clean, and the wheels are straight ahead. 3. Ensure that the tire size is correct for the vehicle and the tire pressure on all tires has been adjusted to proper specifications. KBTree Page 1 of 21 about:blank 1/19/2023 ESTABLISHING PIVOT POINTS 4. Locate the hole behind the steering gear on the Left-Front of the frame. (See Figures 2 and 3.) 5. Pass one of the Plumb Bob (Special Tool GE-53292) strings through the hole from the outside of the frame. 6. Pull the Plumb Bob string through until the point of the weight is barely above the floor. Tie off the string by looping it around the bolts as shown in Figure 4. KBTree Page 2 of 21 about:blank 1/19/2023 7. Locate the matching hole on the passenger side of the frame, which is behind the air conditioning condenser assembly. (See Figure 5 and 6.) KBTree Page 3 of 21 about:blank 1/19/2023 8. Pass the string of the other Plumb Bob (Special Tool GE-53292) through the hole from the outside of the frame. 9. Pull the Plumb Bob string through until the point of the weight is barely above the floor. Tie off the string by looping it around the bolts as shown in Figure 7. KBTree Page 4 of 21 about:blank 1/19/2023 10. Refer to Figure 8 for an illustration of both Plumb Bobs correctly in place. 11. Place masking tape underneath each Plumb Bob weight point. When each of the Plumb Bob weights is still, mark each piece of masking tape with an X directly under the points as shown in Figure 9. KBTree Page 5 of 21 about:blank 1/19/2023 12. When completed there should be 2 Xs under the vehicle as shown labeled A and B in Figure 10. 13. Remove both Plumb Bobs from the frame holes. PLUMB BOB STRING SET UP 14. If not already completed per the special tool instructions, make two overhand loops in one of the Plumb Bob strings as shown in Figure 11. The overall length from loop to loop when stretched taut should be approximately 54cm. KBTree Page 6 of 21 about:blank 1/19/2023 ESTABLISHING CENTERLINE OF VEHICLE Important: when performing Steps 15 – 20, it is critical that the looped string be held taut. Also, the exact position of the loops on the marker pen and the Plumb Bob point must be kept the same for each Step. Finally, both the Plumb Bob point and the marker pen should be kept completely straight up while performing each Step. NOTE: When performing Steps 15 – 20, refer to Figure 12. 15. Using the Plumb Bob weight point, hold one of the loops steadily on Point (A) made on the passenger’s side of the vehicle. Place the capped marker pen into the other loop and put the string taut. Pull the taut string towards to the rear-center of the vehicle to make an estimation of where the masking tape should be for marking the floor and put down a piece of masking tape. (See Figure 12.) 16. Perform Step 15 again, but with the marker pen uncapped, to create about a 3-inch arc on the masking tape at Point (C). (See Figure 13.) KBTree Page 7 of 21 about:blank 1/19/2023 17. Perform Steps 15 and 16 towards the front-center of the vehicle to create a marked arc on the floor at Point (D). (See Figure 12.) 18. Place the point of the Plumb Bob weight into one loop with the point lightly pressed down directly on the center of Point (B) made on the driver’s side of the vehicle. Place the capped marker pen into the other loop and pull the string taut. Pull the taut string towards to the rearcenter of the vehicle to determine if more masking tape is needed on the floor. Lay down more masking tape as necessary. (See Figure 12.) 19. Perform Step 18 again, but with the marker pen uncapped, to create about crossed arc at Point (C) on the floor. (See Figure 12.) 20. Perform Steps 18 and 19 towards the front-center of the vehicle to create a crossed arc at Point (D) on the floor. (See Figure 12.) 21. From about three feet in front of the vehicle use the Cross-Line Laser Level (Special Tool J-53325) to establish the centerline of the vehicle by placing the tool on the floor, turning it on, and aiming the beam directly through the intersection of both points C and D. (See Figure 14.) NOTE: Ensure that enough room is left from the front of the bumper to the Cross-Line Laser Level to allow for about a 12-inch strip of masking tape laid on the floor lengthwise with the vehicle. NOTE: When performing Steps 21 – 22, refer to Figure 14. 22. With the Cross-Line Laser Level still in place, put down a 12-inch piece of masking tape lengthwise under the laser beam directly in front KBTree Page 8 of 21 about:blank 1/19/2023 of the Cross-Line Laser Level. Trace the laser beam line onto the piece of masking tape with a marker pen. (See Figure 14.) This is the Center of the Vehicle reference mark. Establish Camera Offset NOTE: For Steps 23 – 29, refer to Figure 15 as a reference. 23. With the Cross-Line Laser Level still in place, lay an approximately 16” strip of masking tape horizontally on the windshield about 4 inches above the stereo camera. (See Figure 16.) 24. Use a piece of cardboard angled above the masking tape to reflect the laser beam as shown in Figure 17. Use the laser light to mark the center of the vehicle on the masking tape with two dots above each other. Use a ruler to connect the dots into a straight line with a ball point pen. (See Figure 18.) Label this line as the centerline of the truck (C.T.). KBTree Page 9 of 21 about:blank 1/19/2023 25. Use the mount for the Cross-Line Laser Level to attach it to the end of the Target Stand (Special Tool GE-53291) as shown in Figures 19 and 20. Which way the laser will have to be mounted depends on how high the Stereo Camera is mounted on the vehicle you are servicing. NOTE: Adjust the Cross-Line Laser Level height as close as possible to the center of the left (passenger) Stereo Camera lens. If the laser beams flash at any point during Steps 26 and 27, the Cross-Line Laser Level MUST be adjusted so that the angle and height of the horizontal laser beam is more level with the Stereo Camera lens. 26. Point the Cross-Line Laser Level at the passenger side Stereo Camera lens and adjust the Laser until the passenger side lens is bisected vertically and horizontally. (See Figure 21.) KBTree Page 10 of 21 about:blank 1/19/2023 27. Trace the vertical laser beam over the center of the passenger side lens onto the strip of masking tape over the camera with a ball point pen. (See Figure 15.) Mark this line as the center of the lens (C.L.). 28. Keeping the ruler or tape measure parallel with the floor, measure 80mm towards the driver’s side from the center of the lens line and make a dot with a ball point pen. This is the center of the camera. (See Figure 15.) Mark the dot center of camera (C.C.). 29. Measure the distance between the center of the truck (C.T.) and the center of the camera (C.C.) in millimeters and write it down for later use. This measurement is the camera offset of the vehicle. Establish Camera Height 30. Ensure that the Cross-Line Laser Level is still bisecting the passenger side Stereo Camera Lens as shown in Figure 21. Adjust the laser as necessary. 31. Place the end of a tape measure on the floor. Extend the tape measure straight upwards. Record where the horizontal laser beam crosses the tape measure (See Figure 22) and write it down for later use. This is the height of the camera. KBTree Page 11 of 21 about:blank 1/19/2023 Set Up Target 32. Remove the Cross-Line Laser Level from the Target Stand and the mount. Place the Cross-Line Laser Level on the floor and turn it on facing forward from the front of the vehicle. Align the laser beam with the Vehicle Centerline reference mark made on the floor in Step 22. (See Figure 23.) 33. If not already completed per the special tool instructions, attach the Stereo Camera Target (Special Tool GE-53206) to the Target Stand (Special Tool GE-53291). Refer to Figure 24 and adjust the height of the target so that both ends of the target position line are 1,000mm (1m) above the floor. KBTree Page 12 of 21 about:blank 1/19/2023 34. Tape the Plumb Bob string without the loops to the top of the Target Stand. The Plumb Bob string must pass directly through the center of the Target (over the small center mark) as shown in Figure 25. The Plumb Bob weight point should barely be off the floor. Establishing Target Distance for 4650mm (+/- 20mm) NOTE: Adjusting the Target distance should be done by two people. KBTree Page 13 of 21 about:blank 1/19/2023 35. Turn on the Laser Measuring Tool (Special Tool J-53207) and place it against the center of the vehicle’s front bumper cover facing forward. (See Figure 26.) 36. Using the Laser Measuring Tool, place the center of the Target 4,650 mm (+/- 20 mm) from the center of the front bumper cover. (See Figure 27.) 37. Adjust the Target until the Cross-Line Laser Level beam is directly over the Plumb Bob string and the small center mark shown in Figure 25. 38. Ensure that the middle of the target is still 4,650 mm (+/- 20 mm) from the vehicle’s front bumper cover. Adjust the target as necessary. Apply about a 2-foot length of masking tape to the floor centered under the Plumb Bob point, running lengthwise with the laser beam. Mark the masking tape with an X directly underneath the point of the Plumb Bob weight. (See Figure 28.) KBTree Page 14 of 21 about:blank 1/19/2023 39. Use a ruler or piece of cardboard tilted an angle to see the laser beam on the masking tape. (See Figure 29.) Establish two different points of the laser beam about 1 foot apart on the lengthwise masking tape with a dot from the marker pen. (See Figure 30.) Connect the two dots with a straight edge and mark a line. (See Figure 31.) Establishing Target Distance for 7650mm (+/- 20mm) NOTE: Adjusting the Target distance should be done by two people. 40. Using the Laser Measuring Tool, place the center of the Target 7,650 mm (+/- 20 mm) from the center of the front bumper cover. (See Figure 32.) KBTree Page 15 of 21 about:blank 1/19/2023 41. Adjust the Target until the Cross-Line Laser Level beam is directly over the Plumb Bob string and the small center mark shown in Figure 25. 42. Ensure that the middle of the target is still 7,650 mm (+/- 20 mm) from the vehicle’s front bumper cover. Adjust the target as necessary. Apply about a 2-foot length of masking tape to the floor centered under the Plumb Bob point, running lengthwise with the laser beam. Mark the masking tape with an X directly underneath the point of the Plumb Bob weight. (See Figure 33.) 43. Use a ruler or a piece of cardboard tilted an angle to see the laser beam on the masking tape. (See Figure 34.) Establish two different points of the laser beam about 1 foot apart on the lengthwise masking tape with a dot from the marker pen. (See Figure 35.) Connect the two dots with a straight edge and mark a line. (See Figure 36.) KBTree Page 16 of 21 about:blank 1/19/2023 44. Move aside the Target. 45. Use the ruler to mark a spot 6 inches in either direction from the center Plumb Bob X on the line made on the floor in Step 42. (See Figure 37.) Important: when performing Steps 46 – 48, it is critical that the looped string be held taut. Also, the exact position of the loops on the marker pen and the Plumb Bob point must be kept the same for each Step. Finally, both the Plumb Bob point and the marker pen should be kept completely straight up while performing each Step. NOTE: When performing Steps 46 – 48, refer to Figure 38. KBTree Page 17 of 21 about:blank 1/19/2023 46. Using the Plum Bob string with the loops, place the Plumb Bob weight point in one loop exactly in the center of Point (A). Put the capped marker pen in the other loop. Keep the string taut and move the pen to the left (the vehicle’s driver’s side). Apply a piece of masking tape on the floor where the arc at Point (C) will be made. (See Figure 38.) 47. Uncap the pen, keep the line taut and the Plumb Bob weight point in the other loop and create an arced line on the masking tape at Point (C). (See Figure 38.) 48. Use the process described in Steps 41 and 42 to create a crossed arc at Point (C) from Point (B). (See Figure 38.) 49. Perform Steps 45 through 48 on the 4,650mm (+/- 20mm) distance line created at Step 39. Square the Target to the Vehicle 50. Place the laser beam from the Cross-Line Laser Level through the exact center of the Plum Bob X and arc C. The laser beam line is exactly perpendicular (90°) to the centerline of the vehicle. (See Figure 38.) 51. Move the Target back in place at 4650mm (+/- 20mm). Align the Plumb Bob weight point with the X made in Step 38. Use the Laser Measuring Tool to ensure that the Target is 4,650 mm (+/- 20 mm) from the center of the vehicle’s front bumper cover. 52. Lift the Plumb Bob over the back of the Target and coil the string to keep the Plumb Bob Assembly from appearing anywhere in the Target as shown in Figure 39. KBTree Page 18 of 21 about:blank 1/19/2023 53. Move the Cross-Line Laser Level tool beam through the 90° marks from right to left as shown in Figure 40. Align the Target Stand with the laser beam as shown in Figure 42 and lock the casters of the Stand on that side. Move the Cross-Line Laser Level 180° (from left to right as shown in Figure 41.) Adjust the frame of the Target Stand as shown in Figure 43 and lock the casters on that side. KBTree Page 19 of 21 about:blank 1/19/2023 54. Connect IDSS to the vehicle and establish communications (key on, engine off). 55. Select Controller Programming. 56. Select ADAS Stereo Camera. (See Figure 44.) KBTree Page 20 of 21 about:blank 1/19/2023 57. Select Stereo Camera Setup. (See Figure 44.) 58. Follow the prompts and enter all the information/measurements established in previous steps. 59. After a successful learn procedure, IDSS will prompt you to move the target out to a distance of 7,650mm (+/- 20mm) for a camera inspection. Move the Target back in place at 7,650mm (+/- 20mm). Align the Plumb Bob weight point with the X made in Step 38. Use the Laser Measuring Tool to ensure that the Target is 7,650 mm (+/- 20 mm) from the center of the vehicle’s front bumper cover. 60. Follow Steps 50 through 52 to square the Target to the vehicle at 7,650mm (+/-20mm). 61. Lift the Plumb Bob over the back of the Target and coil the string to keep the Plumb Bob Assembly from appearing anywhere in the Target as shown in Figure 39. 62. Follow the prompt on IDSS to complete the camera inspection portion. 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Isu IMPORTANT SAFETY RECALL ANTI-LOCK BRAKE SYSTEM (ABS) & ADVANCED DRIVER ASSISTANCE SYSTEM (ADAS) RECALIBRATION – V2301 • 2022 – 2023MY Isuzu NQR/NRR Diesel Vehicles Produced After 7/26/2021 With RPO Code EM2 or EL5 (200” or 212” respectively) Wheelbase Factory Modifications CONDITION Isuzu Motors Limited has decided that a defect, which relates to motor vehicle safety, exists in certain 2022 – 2023MY Isuzu N-Series Diesel Vehicles produced after 7/26/2021 with RPO Code EM2 or EL5 (200” or 212” respectively) Wheelbase Factory Modifications. When the subject vehicles were modified to extend the frame, the Anti-lock Brake System (ABS) module was not recalibrated to account for the different inputs from the vehicle resulting from the stretched frame. Therefore, when driving in a curve, the Electronic Stability Control (ESC) system, working together with the ABS, may react prematurely or be delayed in reacting, therefore increasing the risk of a crash. If the vehicle is equipped with the optional Advanced Driver Assistance System (ADAS), the ADAS camera was also not recalibrated to account for the different inputs from the vehicle resulting from the stretched frame. Therefore, when driving in a curve with the optional ADAS system activated, the Automatic Emergency Braking System (AEBS) and its accompanying warning light may be delayed in reacting and illuminating, also increasing the risk of a crash. CORRECTION Isuzu dealers will recalibrate the ABS Control Module with the correct wheelbase length and, for the subject vehicles equipped with the optional ADAS (RPO I5D), reprogram the Stereo Camera. This service will be performed free of charge. VEHICLES INVOLVED Involved are certain 2022 – 2023MY Isuzu NQR/NRR Diesel Vehicles produced after 7/26/2021 with RPO Code EM2 or EL5 (200” or 212” respectively) Wheelbase Factory Modifications. AFFECTED VEHICLES INFORMATION IMPORTANT SERVICE INFORMATION FOR:  SERVICE MANAGER  SERVICE ADVISOR  TECHNICIAN  PARTS DEPARTMENT  WARRANTY PERSONNEL BULLETIN NUMBER: CB23-H-001 ISSUE DATE: JANUARY 2023 GROUP: BRAKES CV Important: Dealers are to confirm vehicle eligibility prior to beginning repairs by using IVIS (Isuzu Vehicle Information System). For dealers with involved vehicles, a report of involved vehicles containing the complete vehicle identification numbers has been or will be provided. Dealers will not have a report available if they have no involved vehicles currently assigned. 1. Look up the VIN in the Isuzu Vehicle Information System (IVIS) and confirm the wheelbase option code and length in the “Vehicle Build” section. (This information will be needed to complete the ABS recalibration.) For reference, RPO Code EM2 indicates a 200” wheelbase and RPO Code EL5 indicates a 212” wheelbase. 2. Shift vehicle to park, turn off engine, set parking brake, and block rear wheels. 3. Connect IDSS to the vehicle, click on the “Auto Detect” button and then select “Controller Programming” from the Table of Contents. 4. Select “ABS Setup” under Antilock Brake System and follow the prompts to reprogram the ABS ECU. 5. When prompted, select the correct wheelbase for the vehicle being programmed from the drop-down box. See Figure 1. Figure 1 6. If the vehicle is equipped with ADAS (RPO I5D), select YES from the drop-down box; if it is not equipped with ADAS (RPO I5D), select NO. See Figure 2. SERVICE PROCEDURE Figure 2 7. Follow the prompts from IDSS to complete the ABS ECU programming. 8. After the ABS ECU programming is completed: a. If the vehicle is equipped with ADAS (RPO I5D), proceed to Step 9. b. If the vehicle is NOT equipped with ADAS (RPO I5D), proceed to Applying the Campaign Label. 9. Refer to and follow the instructions in the “Stereo Camera Programming” section of the appropriate Service Manual in IDSS to reprogram the ADAS Stereo Camera. 10. After completing the Stereo Camera Programming, proceed to Applying the Campaign Label. APPLYING THE CAMPAIGN LABEL 11. Using a ball-point pen, fill in a campaign label (Part No. 2-90028-700-0) with Campaign Number V2301, Isuzu dealer code, and repair date. 12. Affix the campaign label onto the driver’s side B-pillar. Refer to the Isuzu ICS Claims Processing Manual for details on Campaign Claim Submission. Submit only one claim as indicated below. Labor Operation Code Description Labor Time V2301 Wheelbase Factory Modifications ABS ECU Recalibration Safety Recall ADD: for Stereo Camera Reprogramming 0.4* 0.9 *Includes 0.1 hours for administrative allowance. DEALER RESPONSIBILITY Dealers are to service all vehicles subject to this campaign at no charge to customers, regardless of mileage, age of the vehicle, or ownership. Customers who have recently purchased vehicles sold from your vehicle inventory, and for which there is no customer information indicated on the dealer listing, are to be contacted by the dealer. Arrangements are to be made to perform the required correction according to the instructions contained in this bulletin. Program follow-up cards should not be used for this purpose, since the customers may not as yet have received the notification letter. In summary, whenever a vehicle subject to this campaign enters or is in your vehicle inventory, or is in your dealership for service, you must take the steps necessary to ensure the recall remedy has been implemented before selling or releasing the vehicle. Important: As required by Federal law, dealers are not to deliver any new vehicle in their inventory, which is covered by a Safety Recall, until the necessary remedy has been performed. Dealers are to confirm vehicle eligibility prior to beginning repairs by using IVIS (Isuzu Vehicle Information System). Not all vehicles may be involved. For dealers with involved vehicles, a listing of involved vehicles containing the complete vehicle identification numbers has been or will be provided. Dealers will not have a report available if they have no involved vehicles currently assigned. OWNER NOTIFICATION This section will be updated when approved US and Canada owner letters are available. CLAIM INFORMATION

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 23V-017 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Isuzu Motors Limited Submission Date : JAN 23, 2023 NHTSA Recall No. : 23V-017 Manufacturer Recall No. : V2301 Manufacturer Information : Manufacturer Name : Isuzu Motors Limited Address : 46401 Commerce Center Drive Plymouth MI 48170-2473 Company phone : 866-441-9638 Population : Number of potentially involved : 242 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2022-2023 ISUZU NQR Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : This recall applies to interim MY 2022 and MY 2023 Class 5 diesel vehicles equipped with ESC, or ESC and optional ADAS, that have the factory frame modification option to extend the wheelbase from 176 inches to 200 or 212 inches. Recall population is based on factory frame modification option code upon purchase of the vehicle. [8] Production Dates : NOV 04, 2021 – JUN 22, 2022 VIN Range 1 : Begin : JALE5W169N7901720 End : JALE5W164P7900686 ✔ Not sequential Vehicle 2 : 2022-2023 ISUZU NRR Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : This recall applies to interim MY 2022 and MY 2023 Class 5 diesel vehicles equipped with ESC, or ESC and optional ADAS, that have the factory frame modification option to extend the wheelbase from 176 inches to 200 or 212 inches. Recall population is based on factory frame modification option code upon purchase of the vehicle. [172] Production Dates : AUG 04, 2021 – JUL 12, 2022 VIN Range 1 : Begin : JALE5W163N7304806 End : JALE5W166P7304107 ✔ Not sequential Part 573 Safety Recall Report 23V-017 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Vehicle 3 : 2022-2022 CHEVROLET LCF 5500HD Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : This recall applies to interim MY 2022 Class 5 diesel vehicles equipped with ESC, or ESC and optional ADAS, that have the factory frame modification option to extend the wheelbase from 176 inches to 200 or 212 inches. Recall population is based on factory frame modification option code upon purchase of the vehicle. [2] Production Dates : SEP 13, 2021 – SEP 13, 2021 VIN Range 1 : Begin : JALEEW16XN7901449 End : JALEEW166N7901450 Not sequential Vehicle 4 : 2022-2023 CHEVROLET LCF 5500XD Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : This recall applies to interim MY 2022 and MY 2023 Class 5 diesel vehicles equipped with ESC, or ESC and optional ADAS, that have the factory frame modification option to extend the wheelbase from 176 inches to 200 or 212 inches. Recall population is based on factory frame modification option code upon purchase of the vehicle. [41] Production Dates : AUG 03, 2021 – JUN 17, 2022 VIN Range 1 : Begin : JALEEW165N7304774 End : JALEEW16XP7303185 ✔ Not sequential Vehicle 5 : 2023-2023 HINO S52 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : This recall applies to MY 2023 Class 5 diesel vehicles equipped with ESC, or ESC and optional ADAS, that have the factory frame modification option to extend the wheelbase from 176 inches to 200 or 212 inches. Recall population is based on factory frame modification option code upon purchase of the vehicle. [19] Production Dates : JUN 02, 2022 – JUL 21, 2022 VIN Range 1 : Begin : JALEMW16XP7302637 End : JALEMW16XP7304369 ✔ Not sequential Part 573 Safety Recall Report 23V-017 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Defect : Description of the Defect : When the subject vehicles were modified to extend the frame to a 200 inch or 212 inch wheelbase, the ADAS camera and ABS module were not recalibrated to account for the different inputs from the vehicle resulting from the stretched frame. Therefore, when driving in a curve certain ADAS features and the ESC system working together with the ABS module may not function properly. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : If the ADAS camera and ABS module are not recalibrated after the frame is stretched, one or more of the following events could occur – in each case, increasing the risk of a crash: • Automatic Emergency Braking System (AEBS) activation (as well as the AEBS warning light) may be delayed when driving in a curve and therefore the AEBS may then decelerate the vehicle more aggressively when activated. • Adaptive Cruise Control may reduce following distance by about 8-10 m when driving in a curve. • ESC may activate in an understeer condition without illuminating brake lights. • ESC may delay activation in an oversteer condition, increasing potential for an oversteer event to occur. Description of the Cause : The ADAS camera and ABS module were not recalibrated after the frame was stretched. Identification of Any Warning that can Occur : NR Involved Components : Component Name 1 : NR Component Description : NR Component Part Number : NR Supplier Identification : Component Manufacturer Name : NR Address : NR NR Country : NR Part 573 Safety Recall Report 23V-017 Page 4 The information contained in this report was submitted pursuant to 49 CFR §573 Chronology : Provided separately Description of Remedy : Description of Remedy Program : Isuzu dealers will recalibrate (1) the ADAS camera to account for the (extended) length of the vehicles, and (2) the ABS module so the ESC system will function properly with the affected vehicles’ longer wheelbases. All subject vehicles are covered under the New Truck Warranty. There is no expectation that these vehicles will need to be remedied outside of the warranty period. How Remedy Component Differs from Recalled Component : Physically there is no difference, this is a recalibration of the ABS module and ADAS camera. Identify How/When Recall Condition was Corrected in Production : On January 10, 2023, INAC QA travelled to the frame modification facilities that carry out the “factory option” frame extensions on behalf of Isuzu and trained the staff so all modified trucks produced after 1/10/2023 have the ADAS cameras and ESC systems properly calibrated. Recall Schedule : Description of Recall Schedule : Isuzu, Chevrolet, and Hino will notify their respective vehicle owners and dealers of this recall. Customers will be informed that the recall repairs will be done free of charge. The recall owner notification is expected to begin 3/10/2023. For additional information, Isuzu owners may contact Isuzu Customer Relations at 1-866-441-9638, Chevrolet owners may contact the GM Medium Duty Truck assistance line at 1-800-862-4389, and Hino owners may contact Hino Customer Service at 1-248-699-9390. Planned Dealer Notification Date : JAN 23, 2023 – JAN 23, 2023 Planned Owner Notification Date : MAR 10, 2023 – MAR 10, 2023 * NR – Not Reported

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DOC ID: SS_V2301_20230123 STOP SALE AND DELIVERY – SAFETY RECALL Date: January 23, 2023 Subject: Stop Sale and Delivery Notice for Upcoming Safety Recall Affected Models: 2022 – 2023MY Isuzu NQR/NRR Diesel Vehicles Produced After 7/26/2021 With RPO Code EM2 or EL5 (200” or 212” respectively) Wheelbase Factory Modifications To: Isuzu Dealer Principal, Sales Manager and Service Manager Effective immediately, stop the sale and delivery of affected vehicles in your inventory, even if a customer has purchased an affected vehicle. We are in the process of taking steps to address a safety related defect in these vehicles. Federal law prohibits the sale and delivery to customers of any vehicle containing a safety defect. You must not deliver any covered vehicles to customers until after the vehicle has been remedied. WHAT IS THE CONDITION? Isuzu Motors Limited has decided that a defect, which relates to motor vehicle safety, exists in certain 2022 – 2023MY Isuzu N-Series Diesel Vehicles produced after 7/26/2021 with RPO Code EM2 or EL5 (200” or 212” respectively) Wheelbase Factory Modifications. When the subject vehicles were modified to extend the frame, the Anti-lock Brake System (ABS) module was not recalibrated to account for the different inputs from the vehicle resulting from the stretched frame. Therefore, when driving in a curve, the Electronic Stability Control (ESC) system, working together with the ABS, may react prematurely or be delayed in reacting, therefore increasing the risk of a crash. If the vehicle is equipped with the optional Advanced Driver Assistance System (ADAS), the ADAS camera was also not recalibrated to account for the different inputs from the vehicle resulting from the stretched frame. Therefore, when driving in a curve with the optional ADAS system activated, the Automatic Emergency Braking System (AEBS) and its accompanying warning light may be delayed in reacting and illuminating, also increasing the risk of a crash. WHAT WE WILL DO Isuzu Commercial Truck of America, Inc. has issued this notice, affected inventory reports for dealers with affected inventory, and campaign bulletin CB23-H-001 for dealers to immediately begin repairs. WHAT YOU SHOULD DO Confirm the affected vehicles in your (dealer) inventory, open a repair order referencing this Stop Sale and begin repairs per the campaign bulletin. IMPORTANT: Always confirm vehicle eligibility prior to beginning repairs by using the Isuzu Vehicle Information System (IVIS). You will receive another notice regarding owner notification as well as a revised campaign bulletin containing sample owner letters once they have been approved by NHTSA and Transport Canada. We regret any inconvenience this action may cause you. Sincerely, Isuzu Commercial Truck of America, Inc. Isuzu Commercial Truck of America, Inc. Customer Relations Department 1400 S. Douglass Road, Suite 100, Anaheim, CA 92806 *1-866-441-9638

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 23V-017 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Isuzu Motors Limited Submission Date : FEB 01, 2023 NHTSA Recall No. : 23V-017 Manufacturer Recall No. : V2301 Manufacturer Information : Manufacturer Name : Isuzu Motors Limited Address : 46401 Commerce Center Drive Plymouth MI 48170-2473 Company phone : 866-441-9638 Population : Number of potentially involved : 242 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2022-2023 ISUZU NQR Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : This recall applies to interim MY 2022 and MY 2023 Class 5 diesel vehicles equipped with ESC, or ESC and optional ADAS, that have the factory frame modification option to extend the wheelbase from 176 inches to 200 or 212 inches. Recall population is based on factory frame modification option code upon purchase of the vehicle. [8] Production Dates : NOV 04, 2021 – JUN 22, 2022 VIN Range 1 : Begin : JALE5W169N7901720 End : JALE5W164P7900686 ✔ Not sequential Vehicle 2 : 2022-2023 ISUZU NRR Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : This recall applies to interim MY 2022 and MY 2023 Class 5 diesel vehicles equipped with ESC, or ESC and optional ADAS, that have the factory frame modification option to extend the wheelbase from 176 inches to 200 or 212 inches. Recall population is based on factory frame modification option code upon purchase of the vehicle. [172] Production Dates : AUG 04, 2021 – JUL 12, 2022 VIN Range 1 : Begin : JALE5W163N7304806 End : JALE5W166P7304107 ✔ Not sequential Part 573 Safety Recall Report 23V-017 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Vehicle 3 : 2022-2022 CHEVROLET LCF 5500HD Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : This recall applies to interim MY 2022 Class 5 diesel vehicles equipped with ESC, or ESC and optional ADAS, that have the factory frame modification option to extend the wheelbase from 176 inches to 200 or 212 inches. Recall population is based on factory frame modification option code upon purchase of the vehicle. [2] Production Dates : SEP 13, 2021 – SEP 13, 2021 VIN Range 1 : Begin : JALEEW16XN7901449 End : JALEEW166N7901450 Not sequential Vehicle 4 : 2022-2023 CHEVROLET LCF 5500XD Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : This recall applies to interim MY 2022 and MY 2023 Class 5 diesel vehicles equipped with ESC, or ESC and optional ADAS, that have the factory frame modification option to extend the wheelbase from 176 inches to 200 or 212 inches. Recall population is based on factory frame modification option code upon purchase of the vehicle. [41] Production Dates : AUG 03, 2021 – JUN 17, 2022 VIN Range 1 : Begin : JALEEW165N7304774 End : JALEEW16XP7303185 ✔ Not sequential Vehicle 5 : 2023-2023 HINO S52 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : This recall applies to MY 2023 Class 5 diesel vehicles equipped with ESC, or ESC and optional ADAS, that have the factory frame modification option to extend the wheelbase from 176 inches to 200 or 212 inches. Recall population is based on factory frame modification option code upon purchase of the vehicle. [19] Production Dates : JUN 02, 2022 – JUL 21, 2022 VIN Range 1 : Begin : JALEMW16XP7302637 End : JALEMW16XP7304369 ✔ Not sequential Part 573 Safety Recall Report 23V-017 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Defect : Description of the Defect : When the subject vehicles were modified to extend the frame to a 200 inch or 212 inch wheelbase, the ADAS camera and ABS module were not recalibrated to account for the different inputs from the vehicle resulting from the stretched frame. Therefore, when driving in a curve certain ADAS features and the ESC system working together with the ABS module may not function properly. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : If the ADAS camera and ABS module are not recalibrated after the frame is stretched, one or more of the following events could occur – in each case, increasing the risk of a crash: • Automatic Emergency Braking System (AEBS) activation (as well as the AEBS warning light) may be delayed when driving in a curve and therefore the AEBS may then decelerate the vehicle more aggressively when activated. • Adaptive Cruise Control may reduce following distance by about 8-10 m when driving in a curve. • ESC may activate in an understeer condition without illuminating brake lights. • ESC may delay activation in an oversteer condition, increasing potential for an oversteer event to occur. Description of the Cause : The ADAS camera and ABS module were not recalibrated after the frame was stretched. Identification of Any Warning that can Occur : NR Involved Components : Component Name 1 : Electronic Hydraulic Control Unit (EHCU) Component Description : Base component for controlling the hydraulic service brakes. Anti-lock Brake System, Electronic Stability Control, Automatic Emergency Braking. Component Part Number : 8976513901, 8978299390 Component Name 2 : ADAS Stereo Camera Component Description : Base component for early driver warning Advanced Driver Assistance System and Forward Collision Avoidance Component Part Number : 8979014302, 8979038031 Part 573 Safety Recall Report 23V-017 Page 4 The information contained in this report was submitted pursuant to 49 CFR §573 Supplier Identification : Component Manufacturer Name : NR Address : NR NR Country : NR Chronology : Provided separately Description of Remedy : Description of Remedy Program : Isuzu dealers will recalibrate (1) the ADAS camera to account for the (extended) length of the vehicles, and (2) the ABS module so the ESC system will function properly with the affected vehicles’ longer wheelbases. All subject vehicles are covered under the New Truck Warranty. There is no expectation that these vehicles will need to be remedied outside of the warranty period. How Remedy Component Differs from Recalled Component : Physically there is no difference, this is a recalibration of the ABS module and ADAS camera. Identify How/When Recall Condition was Corrected in Production : On January 10, 2023, INAC QA travelled to the frame modification facilities that carry out the “factory option” frame extensions on behalf of Isuzu and trained the staff so all modified trucks produced after 1/10/2023 have the ADAS cameras and ESC systems properly calibrated. Recall Schedule : Description of Recall Schedule : Isuzu, Chevrolet, and Hino will notify their respective vehicle owners and dealers of this recall. Customers will be informed that the recall repairs will be done free of charge. The recall owner notification is expected to begin 3/10/2023. For additional information, Isuzu owners may contact Isuzu Customer Relations at 1-866-441-9638, Chevrolet owners may contact the GM Medium Duty Truck assistance line at 1-800-862-4389, and Hino owners may contact Hino Customer Service at 1-248-699-9390. Planned Dealer Notification Date : JAN 23, 2023 – JAN 23, 2023 Planned Owner Notification Date : MAR 10, 2023 – MAR 10, 2023 * NR – Not Reported

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