A service update has been issued for several 2020 and 2021 model-year GM vehicles to address an issue related to the software programming for various electronic control modules.
The problem: in affected GM vehicles, various control modules may have been programmed by a dealership service technician using an incorrect VIN that did not match the actual VIN of the vehicle being repaired.
The hazards: this condition can result in the wrong calibration files being installed on the vehicle, which may lead to various system malfunctions and other related issues.
The fix: dealerships will be instructed to reprogram the electronic control modules in affected vehicles with the proper software. This will prevent future control module malfunctions in affected vehicles.
Affected components: electronic control module, control module software.
Number of affected vehicles: GM did not say how many vehicles may be affected by this particular control module issue.
Owners should: customers affected by this Service Update can wait for GM to reach out to them, at which point they will be instructed to make an appointment with their dealership for repairs. The service update was activated in August 2021 and will not expire until the end of the involved vehicle’s New Vehicle Limited Warranty period. Owners of affected vehicles can also reach out to Cadillac, Chevrolet or GMC directly with any questions or concerns they may have using the contact information included below.
- GM Service Update number: N202325870
- Chevrolet Customer Service: 1-800-222-1020
- Cadillac Customer Service: 1-877-248-2080
- GMC Customer Service: 1-800-462-8782
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