GVWR: Class 2H: 9,001 - 10,000 lb (4,082 - 4,536 kg)
Make: GMC
Manufacturer: GENERAL MOTORS LLC
Manufacturer Id: 984
Model: Sierra
Model Year: 2008
Plant City: Pontiac
Plant Company Name: GM Truck Group
Plant Country: United States (USA)
Plant State: Michigan
Series: 1/2 Ton
Trim: SLE
Vehicle Type: TRUCK
Model year
COMPONENT
Complaint
2011
ELECTRICAL SYSTEM
VEHICLE SPORADICALLY SPONTANEOUSLY LOCKS ALL 4 DOORS WITHIN 10 SECONDS AFTER CLOSING THE DOOR. NO TOUCHING OF REMOTE, NO ACCIDENTALLY HITTING A DOOR SWITCH WHILE EXITING THE VEHICLE. IT HAPPENS WHEN I'M AT THE BACK OF THE TRUCK, OR 10 FEET AWAY. ALWAYS WITHIN 10 TO 15 SECONDS AFTER EXITING. IT MAY SOUND STRANGE, BUT IT HAPPENS MORE OFTEN TOWARD THE END OF THE ONSTAR YEARLY CONTRACT. SAFETY CONCERN - I HAVE A 3-YEAR OLD GRANDSON WHO LIKES TO GO WITH ME. WHAT HAPPENS IF I FORGET TO TAKE THE KEYS WITH ME WHILE I'M REFUELING ON A HOT SUMMER DAY AND I HAVEN'T EXTENDED THE ONSTAR CONTRACT? OBVIOUSLY, I'D BREAK A WINDOW IF NECESSARY, BUT THEN I'D HAVE TO BUY ANOTHER WINDOW. IT APPEARS MY VEHICLE IS NOT THE ONLY ONE HAVING THIS PROBLEM. OF COURSE, NO TROUBLE CODES THEREFORE DEALER CAN'T REPAIR, BUT MY DEALER'S SERVICE REP ADMITS IT HAPPENS VERY OFTEN AND NOT LIMITED TO GMC TRUCKS. *TR
2008
ENGINE
WHEN TRAVELING MERGING ON I-70 OUTSIDE OF LONDON OHIO MY TRUCK STARTED MAKING VERY LOUD EXHAUST SOUND. AFTER INSPECTION FOUND THAT DRIVER SIDE AND PASSENGER SIDE REAR EXHAUST MANIFOLD BOLTS WHERE BROKE OFF ALLOWING UNFILTERED EXHAUST TO PASS. IF LEAK WOULD HAVE BEEN TOO BAD THE HIGH TEMPERATURE OF THE EXHAUST COULD POTENTIALLY CAUSE A FIRE INSIDE THE ENGINE COMPARTMENT. THE EXHAUST ALSO BROKE WELDS OFF THE EXHAUST CAUSING THE EXHAUST TO FALL THE BREAK IS WHERE THE H-PIPE COME TOGETHER. *TR
