2019 Chevrolet 6500, 2019 Chevrolet Silverado 6500 Recall: Engine control module (ECM) was calibrated incorrectly, allowing the…
NHTSA campaign 21V346000 · Engine and Engine Cooling · filed May 13, 2021 · verified Jul 30, 2026
The defect
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.
The risk
Tire failure can occur if the vehicle speed exceeds the maximum tire speed rating, increasing the risk of a crash.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →The fix — what to do
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.
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.
Affected vehicles
Related recalls
More Chevrolet 6500 recalls
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Source: NHTSA recall database, campaign 21V346000 (manufacturer number N202325530). Data last verified Jul 30, 2026.