2018 Cadillac XT5 Electrical System

The contact owns a 2018 Cadillac XT5. The contact stated that while driving at slow speeds, the vehicle unintendedly shut off. The vehicle was towed to the local dealer who diagnosed that the body control module (BCM) had failed and needed to be replaced. The contact was informed that BCM failure was caused by internal corrosion to the unit due to condensation leaking from the HVAC water line, which was positioned above the BCM. The vehicle was repaired. The contact stated that the BCM unit was previously replaced due to the same failure. The manufacturer was notified of the failure. The failure mileage was 95,000.

During the two years we have owned this vehicle, it has completely shut down. It usually happens when the vehicle is stopped or coming to a stop. Today 4.17.2023 it happened at 67 mph as I was accelerating to highway speed. The vehicle shut down for 2-3 seconds then restarted. The vehicle decelerated very hard, almost as if it were in a collision.

WHEN BACKING CAR UP, OFTEN TIMES THE YELLOW "GUIDE LINES" APPEAR, OFTEN TIMES DON'T. NOTE MAKES NO DIFFERENCE IF DAYLIGHT OR NIGHT, WEATHER CAR IS CLEAN OR DIRTY (NOT AFFECTED BY BACKUP CAMERA), CLEAR OUT OR RAINING. BRAND NEW IN APRIL 2018, PICKED UP FROM DEALERSHIP, HAS HAPPENED SINCE 1ST WEEK OF OPERATION. TOOK TO DEALERSHIP RECENTLY, COULD NOT FIND ISSUE, SAID NO KNOWN PROBLEMS WITH LIKE CARS.