Telematics module failure with battery drain
ELECTRICAL SYSTEM
43 NHTSA complaints · 2025-08 → 2026-07
“The dealer confirmed that the OnStar/telematics module is malfunctioning and continuously draining the battery. The defective module is on backorder with no estimated arrival date, leaving the vehicle unusable”
“Telematic module diagnosed to fail by the dealer service department. Replacement part is not available after 3 months, and not ETA from GM parts department”
“OnStar telematics unit stopped working with no notification in the infotainment system. The LED light remained GREEN in color advising me that the OnStar system was working”