GVWR: Class 3: 10,001 - 14,000 lb (4,536 - 6,350 kg)
Make: GMC
Manufacturer: GENERAL MOTORS LLC
Manufacturer Id: 984
Model: Sierra
Model Year: 2007
Other Engine Info: L61: 2.2L, 4Cyl, Aluminium, DOHC MFI
LBZ: 6.6L, V8, DI, Turbo Diesel, inc HP
Plant City: Flint
Plant Company Name: GMNA
Plant Country: United States (USA)
Plant State: Michigan
Trim: 3500 (1 ton)
Valve Train Design: Dual Overhead Cam (DOHC)
Vehicle Type: TRUCK
Model year
COMPONENT
Complaint
2004
POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE)
REFERENCE A GMC 2004 SIERRA 3500 4 WHEEL DRIVE PICK UP TRUCK, 6.6L DIESEL ENGINE WITH 6 SPEED MANUAL TRANSMISSION. THE MOLDED RUBBER AROUND THE DRIVELINE CENTER SUPPORT CARRIER BEARING (PART # 12472424) DRY ROTTED CAUSING DRIVELINE VIBRATION THAT, IN TURN CAUSED THE TRANSFER CASE TO FAIL. THE VIBRATION WAS SLIGHT AND NOT CONSTANT, NOT INDICATING A MAJOR PROBLEM. THE PART IN QUESTION IS A NON-SERVICEABLE PART, PREVENTIVE MAINTENANCE DID NOT AND WOULD NOT PREVENT THIS FAILURE. THE TRANSFER CASE WAS TOTALLY DESTROYED AND WAS ON THE VERGE OF TOTAL LOCK UP WHICH WOULD HAVE CAUSED THE REAR WHEELS TO LOCK UP UNDER NORMAL DRIVING CONDITIONS. THE COST TO FIX THIS PROBLEM IS OVER $3000 DOLLARS TO HAVE THE DEALER DO THE REPAIRS. SINCE I AM A COMPETENT MECHANIC, I INSPECTED AND FOUND THIS PROBLEM WHEN I FIRST NOTICED A SLIGHT VIBRATION, MOST VEHICLE OWNERS WOULD HAVE DRIVEN THE TRUCK UNTIL THE WHEELS LOCKED UP POSSIBLY CAUSING A LIFE THREATENING CRASH. THE PART IN QUESTION IS WITHOUT A DOUBT A DEFECTIVE PART. IT IS MADE IN CHINA. WHILE MANY PARTS COMING FROM CHINA TODAY ARE OF SUFFICIENT QUALITY, CHINESE RUBBER IS SUBSTANDARD AND DRY ROTS IN ABOUT TWO YEARS UNDER MOST CIRCUMSTANCES. IT IS UNCONSCIONABLE FOR GM TO USE SUBSTANDARD PARTS IN SUCH CRITICAL AREAS OF THEIR VEHICLES. *TR
2007
POWER TRAIN
TRANSMISSION COOLER LINE LEAK COULD LEAK OUT ALL FLUID AND CAUSE TRANSMISSION FAILURE. THE CONSUMER WAS INFORMED THE VEHICLE NEEDED TRANSMISSION COOLER LINES, TRANSMISSION FLUID AND CONDITIONER AT A COST OF $ 822.32. THE SERVICE MANAGER AGREED TO CUT THE BILL TO $411.16. THE CONSUMER CONTACTED GM CUSTOMER SERVICE TO MAKE A COMPLAINT. AFTER AN INVESTIGATION, THE CONSUMER WAS INFORMED BY GM THAT THE DEALER STATED THE FAILURE WAS CAUSED BY THE AGE OF THE VEHICLE AND GM WOULD NOT COVER THE COST OF THE PART. THE CONSUMER STATED THE PART WAS MADE OF DEFECTIVE MATERIALS AND SHOULD HAVE BEEN RECALLED. WHEN THE CONSUMER CONTACTED THE DEALER, THEY STATED THEY HAD NOT MADE A DIAGNOSIS OF THE FAILURE AND THE PARTS WERE SENT TO GM TO BE EXAMINED. UPDATED IVOQ 01/04/12 *JB *TR
