May 13, 2021 NHTSA CAMPAIGN NUMBER: 21V346000
Engine Control Module Calibrated Incorrectly
Tire failure can occur if the vehicle speed exceeds the maximum tire speed rating, increasing the risk of a crash.
NHTSA Campaign Number: 21V346
Manufacturer General Motors, LLC
Components ENGINE AND ENGINE COOLING
Potential Number of Units Affected 196
Summary
General Motors, LLC (GM) is recalling certain 2019-2020 Chevrolet 6500HD vehicles. The engine control module (ECM) was calibrated incorrectly, allowing the vehicle to exceed the tires’ maximum speed rating of 75 mph.
Remedy
Dealers will update the ECM software, free of charge. Owner notification letters were mailed June 7, 2021. Owners may contact Chevrolet customer service at 1-800-222-1020. GM’s number for this recall is N202325530.
Notes
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.
Check if your Vehicle has a Recall
Condition
General Motors has decided that a defect which relates to motor vehicle safety exists in certain 2019-2020 model year Chevrolet Medium Duty 6500HD trucks built with tires with a maximum speed rating of 75mph (regular production option (RPO) codes XDV for the front tires and YAP for the rear tires) and engine control module software that limits the speed of the vehicle to 79 mph. If vehicle speed exceeds the maximum tire rated speed, the tire structure could be compromised, ultimately increasing the risk of tire failure and of a crash.
Correction
Dealers will update the software calibration for the engine control module (ECM) to set the speed limiting software so that the vehicle speed will not exceed 75 mph and therefore meet the maximum speed rating of the tires.
Parts
No parts are required for this repair.
Service Procedure
1. Reprogram the Engine Control Module. Refer to K20 Engine Control Module: Programming and Setup in SI. Modify
as required (e.g., select x module from the controller screen. Then provide step-by-step instructions or refer to SI
procedure.
Frequently Asked Questions (FAQs) for Safety Recall N202325530 Speed Limiting Exceeds Tire Rating
These questions and answers are being provided to help GM dealers respond to inquiries from involved vehicle owners about the Safety recall identified above.
Q1) Which vehicles are involved?
2019 – 2020 model year Chevrolet Silverado 6500HD
Q2) What is the issue or condition?
General Motors has decided that a defect which relates to motor vehicle safety exists in certain 2019-2020 model year Chevrolet Medium Duty 6500HD trucks built with tires with a maximum speed rating of 75mph (regular production option (RPO) codes XDV for the front tires and YAP for the rear tires) and engine control module software that limits the speed of the vehicle to 79 mph.
Q3) What symptoms may be experienced? What warning signs may be associated with the issue or condition described?
None.
Q4) What is the remedy/repair?
Dealers will update the software calibration for the engine control module (ECM) to set the speed limiting software so that the vehicle speed will not exceed 75 mph and therefore meet the maximum speed rating of the tires.
Q5) What is the safety risk? Is the vehicle safe to drive?
If vehicle speed exceeds the maximum tire rated speed, the tire structure could be compromised, ultimately increasing the risk of tire failure and of a crash.
Q6) Does the customer have to pay for this remedy/repair?
No, this inspection/repair will be done at no cost to the customer.
Q7) Is the remedy/repair available now?
Yes, please see the attached bulletin for details.
Q8) What should customers do until recall repairs can be completed? Are there any special instructions?
If special instructions are provided, they will be included in the notification letters to customers.
Q9) How can customers check to see if their vehicle is involved in this field action?
Customers who own a vehicle involved in the field action will be notified by mail by General Motors, but they may also check their Vehicle Identification Number (VIN) for field actions in GM Owner Center at https://my.gm.com/recalls or via NHTSA’s website at https://vinrcl.safercar.gov/vin/.
Q10) If customers are concerned, can they get a rental car or courtesy transportation?
Courtesy transportation is available for customers whose vehicles are involved in this recall and are within the warranty coverage period for the warranty which is associated with this recall. Please refer to Warranty Administration Bulletin #17-NA-073: Field Action Courtesy Transportation Policy for further information.
2 Affected Products
Vehicle
12 Associated Documents
Manufacturer Notices(to Dealers,etc) – Dealer Message re N202325530-01 – Safety Recall Speed Limiting Exceeds Tire Rating Customer Letter Added
Defect Notice 573 Report
RCLRPT-21V346-4832.PDF 214.232KB
Manufacturer Notices(to Dealers,etc) – Dealer Message re N202325530 – Safety Recall Speed Limiting Exceeds Tire Rating
Safety Bulletin
RCSB-21V346-1204.pdf 537.725KB
Miscellaneous Document – Frequently Asked Questions (FAQs) for Safety Recall N202325530 Speed Limiting Exceeds Tire Rating
RMISC-21V346-6406.pdf 101.606KB
Recall Acknowledgement
RCAK-21V346-5760.pdf 645.005KB
Safety Bulletin – Bulletin re N202325530 Speed Limiting Exceeds Tire Rating
RCSB-21V346-0818.pdf 559.784KB
Miscellaneous Document – Frequently Asked Questions (FAQs) for Safety Recall N202325530 Speed Limiting Exceeds Tire Rating
RMISC-21V346-4287.pdf 101.606KB
Recall Quarterly Report #1, 2021-2
RCLQRT-21V346-6766.PDF 211.135KB
ISSUED Owner Notification Letter(Part 577)
RCONL-21V346-1957.pdf 78.398KB
Recall Quarterly Report #3, 2021-4
RCLQRT-21V346-7817.PDF 211.319KB
Recall Quarterly Report #2, 2021-3
RCLQRT-21V346-9222.PDF 211.231KB
Latest Recalls Documents
https://www-odi.nhtsa.dot.gov/acms/cs/documentList.xhtml?docId=21V346&docType=RCL
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You can then compare the latest part number with the actual number installed on the vehicle to determine if a reprogram is needed.
The Service Programming System (SPS) application is part of the TIS2Web system. To program an ECU, the SPS application must communicate with the vehicle control modules using the proper J2534 programming interface tool.
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Last update on 2022-05-22 / Affiliate links / Images from Amazon Product Advertising API
Last update on 2022-05-22 / Affiliate links / Images from Amazon Product Advertising API
