The problem: in affected Chevy Bolt EV and Bolt EUV models, the driver information center (DIC) may display a malfunction indicator light (MIL) along with the message “Service Transmission, Unable to Shift,” or “Service Transmission Now, Unable to Shift Soon.”
The hazards: this problem does not pose a safety hazard, but it may affect the operation of the vehicle’s powertrain.
The fix: GM dealer technicians will be instructed to update the engine control module in affected vehicles. This should clear the error message in the DIC and clear the MIL.
Affected components: engine control module, software.
- 2022 Chevy Bolt EV
- 2022 Chevy Bolt EUV
Number of affected vehicles: it’s unclear how many vehicles are affected by this Service Bulletin. Affected vehicles are located in North America, Brazil and South Korea.
Owners should: GM will notify owners of affected vehicles and instruct them to make an appointment with their dealer. Owners that are unsure whether or not their vehicle is affected by this service bulletin can reach out to GM directly with any questions or concerns they may have using the Service Update number and contact information included below.
- Service Update number: 22-NA-139
- Chevrolet Customer Service: 1-800-222-1020
The Chevy Bolt EV and Bolt EUV crossovers are produced at the GM Orion plant in Michigan. The 2023 model-year Bolt EV and Bolt EUV began rolling off the production line there on July 21st.