The Onstar service will not operate. The Onstar system drains the batter so the car will not start. Cadillac cant get the operative part for the Onstar, the telematic module. So the car is sitting at the Cadillac dealer and cant be repaired..

Multiple issues: Leaking transmission fluid, multiple issues with on star system, side detection system, lane keep assist. On star issue involves being unable to contact an advisor in the case of an emergency. Apps in car work intermittently, including Google Maps which is imbedded in the vehicle system. Dealership has stated that onstar and map issue is ongoing and multiple complaints have been received about this issue. Transmission leak started appears to have started right after the purchase of the vehicle. Lane Keep assist and side detection system displayed error message stating that the systems needed to be serviced.

The contact owns a 2025 Cadillac XT4. The contact stated that the vehicle independently started after it was parked and turned off. The contact stated that the failure was intermittent but was a recurring failure. There was no warning light illuminated. The vehicle was taken to a local dealer, where it was diagnosed, and determined that the computer system needed to be reset. The vehicle was repaired; however, the failure reoccurred. The manufacturer was not informed of the failure. The failure mileage was approximately 17,000.

Telematics Controller has gone out. Took 2 weeks to get vehicle into dealership. After diagnosis we are told there is no availability on the part and no backorder or visibility as to when it will be available. Functionality of vehicle, value and user safety has been effected as safety and convenience features originally on the vehicle no longer function and cause distraction.

The vehicle’s OnStar system, emergency calling features, and built-in navigation/maps do not function properly. The maps do not work, emergency calling is unreliable, and OnStar is unable to accurately locate my vehicle. This is a serious safety concern because these systems are intended to provide immediate emergency assistance and precise location information. I am the primary caregiver for my minor son, who has significant medical conditions like heart failure and requires ongoing cardiac care. In the event of a medical emergency while driving with him, it is critical that emergency services be able to locate us immediately and accurately. Because the vehicle cannot reliably provide location data or emergency communication, emergency responders may not be able to find us if assistance is needed. This creates a dangerous situation and defeats the purpose of the vehicle’s safety systems. The failure of these features makes the vehicle unsafe for transporting my child, and I do not feel safe driving it. The issue appears to involve the vehicle’s communication, software, or electrical systems and remains unresolved despite being reported. The vehicle displayed a dashboard warning stating “Service Emergency Calling,” indicating a failure of the emergency communication system. This warning confirms the emergency calling feature is not operating as designed At this moment the part is on backorder till i don’t know when