GM has begun a Customer Satisfaction Program for certain GMC Hummer EV models to address an issue related to the pickup truck’s high-voltage connector for the battery pack.
The problem: in affected vehicles, the high-voltage connector may corrode and allow water to leak into the vehicle’s high-voltage battery pack. If this condition occurs, a malfunction indicator light (MIL) will appear on the vehicle’s driver information to display to alert the operator of the issue.
The hazards: GM did not say what potential problems this condition could lead to, however it seems likely this problem could result in further damage to the high-voltage connector and/or battery pack if not properly addressed.
The fix: GM will instruct service technicians to apply additional AC Delco RTV Engine Sealant to the high-voltage connector, which should help to prevent corrosion and prevent water from leaking into the connector/battery.
Affected components: high voltage connector, lithium-ion battery pack.
- GMC Hummer EV
- BrightDrop EV600
Number of affected vehicles: roughly 424 vehicles are believed to be affected by this particular issue across both the GMC Hummer EV and BrightDrop EV600 model lines.
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 Customer Satisfaction Program can reach out to GM directly with any questions or concerns they may have using the Service Update number and contact information included below. To be clear, this problem is not being addressed through a Product Safety Recall and is instead only a Customer Satisfaction Program.
- GM Customer Satisfaction Program Number: N222362090
- GMC Customer Service: 1-800-462-8782
- NHTSA Toll Free: 1-888-327-4236
- NHTSA (TTY): 1-800-424-9153