GMC Sonoma Repair and Maintenance
A guide to problems, costs, maintenance and repair for your GMC Sonoma
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GMC Sonoma ProblemsABS Light Due to Brake System Control Unit Failure
Vehicles using the enhanced vortec V6 engine may be hard to start run poorly and/or use to much fuel due to a fuel leak inside the intake manifold plenum. Commonly this is caused by a leaking fuel pressure regulator or fuel line. The fuel system will need to be pressurized with the upper intake manifold removed in order to determine the exact cause of the leak. Removing the "tuning valve" from the upper intake can allow for limited visual inspection without removing the upper intake manifold.
An engine oil leak may develop from the distributor shaft o-ring seal.
GMC Sonoma QuestionsInjectors are putting too much fuel into the cylinders (1 answer)
Injecting too much fuel into the cylinders. Injectors are new, pressure regulator is new. Plugs are new.????
Truck is idleing way too high. Ive been told it's the motherboard. Where is it located so I can fix this issue. Everything else has been done to fix the issue. How can I get this repaired?
My truck will switch to 4hi when driving it down the road and turning the corner making it hard to turn
GMC Sonoma RecallsAir Bag Labels May Be Incorrect
Vehicles may have an air bag warning label with incorrect statements. This is against the Federal Motor Vehicle Safety Standard. Owners will be sent corrected labels and installation instructions. The recall began June 4, 2004. The GM recall number is 04021.
The payload as listed on the vehicle certification label exceeds the actual limitations of the vehicle. If the weight limitations of the vehicle are exceeded, the vehicle will not operate as designed, and may cause a safety issue. Owners will be sent a revised vehicle certification label that is accurate.