Engine control module (ecu/ecm): softwareRecall 21V-346 · Chevrolet vehicles
General Motors, LLC recall 21V-346 covers 196 Chevrolet vehicles for a engine control module (ecu/ecm): software problem, reported to NHTSA on May 13, 2021. The manufacturer's latest report (2023 Q1) shows 77% of affected vehicles repaired.
Source: NHTSA recall 21V346000 and manufacturer quarterly reports. Started by the manufacturer.
The problem
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.
The fix
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.
Recall repairs are free. Confirm whether this recall is open on your vehicle by entering its VIN at nhtsa.gov/recalls.
How fast cars are being fixed
77%repaired
Share of affected vehicles repaired in each quarterly report the manufacturer filed with NHTSA.