ENGINE WENT INTO REDUCED ENGINE POWER (REP) MODE AND 4 DIAGNOSTIC TROUBLESHOOTING CODES (DTCВїїS) WERE SET ALL RELATING TO THE THROTTLE ACTIVATION CIRCUIT (TAC). WHEN THIS HAPPENS THE ENGINE POWER IS SHUT OFF IMMEDIATELY AND THE ENGINE WILL ONLY IDLE. THIS IS A KNOWN ISSUE WITH GM AND IS A POTENTIALLY EXTREMELY DANGEROUS SAFETY ISSUE. THE ENTIRE TAC SYSTEM ( THROTTLE BODY, TAC MODULE, PCM, WIRE HARNESSES/CONNECTORS) NEEDS TO BE INVESTIGATED.
2002
ENGINE AND ENGINE COOLING:ENGINE
ENGINE SHUTS DOWN WHILE DRIVING: I HAVE A YUKON XL 2002. OVER THE PAST 6 MONTHS THE ENGINE WOULD SUDDENLY SHUT DOWN WHILE THE CAR IS BEING DRIVEN. IT HAS OCCURRED AT HIGH SPEED AND AT LOW SPEED. I HAVE TAKEN IT BACK TO THE DEALER NO LESS THAN 5 TIMES AND THE PROBLEM PERSISTS. THIS REPRESENTS A MAJOR DANGER AS WHILE ON THE HIGHWAY, WHEN THE ENGINE SHUTS DOWN THE CAR BECOMES DIFFICULT TO MANEUVER AND MOVING OUT OF THE HIGHWAY TRAFFIC HAS BEEN EACH TIME EXTREMELY DANGEROUS TO ME AND TO OTHER DRIVERS. *TR