GVWR: Class 1C: 4,001 - 5,000 lb (1,814 - 2,268 kg)
Make: GMC
Manufacturer: GENERAL MOTORS LLC
Manufacturer Id: 984
Model: Sonoma
Model Year: 2001
Plant City: Linden
Plant Company Name: GM Truck Group
Plant Country: United States (USA)
Plant State: New Jersey
Trim: 1/2 ton
Vehicle Type: TRUCK
Model year
COMPONENT
Complaint
1991
SERVICE BRAKES, HYDRAULIC:ANTILOCK
THE LEFT FRONT BRAKE AND CONNECTORS WERE NOT SECURED, CAUSING BRAKE FLUID LEAKAGE. *AK *JB
2001
POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE)
PURCHASED TRUCK IN 2006. MILEAGE AT 48,000. TROUBLE STARTING, FUEL PUMP REPLACED. OIL COOLING LINES REPLACED. SUBSEQUENTLY, AUTOMATIC TRANSMISSION SLIPS FROM 2 WD TO 4 WD FOR NO APPARENT REASON. I HAVE NOTICED THAT THIS PROBLEM OCCURS WHEN ACCELERATOR IS NOT DEPRESSED, AND WHEELS ARE TURNED, TO TURN A CORNER OR TO TURN INTO/OUT OF A DRIVEWAY. USUALLY THERE IS A DEPRESSION IN PATH AS WELL, I.E. CURB/DIP AT DRIVEWAY ENTRANCE, POTHOLE, ETC. ENGINE IS NOT ALWAYS COLD; SOMETIMES SHIFTS AT END OF TRIP, SOMETIMES AT BEGINNING, NO ADVERSE WEATHER CONDITIONS.