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Problems for specific GMC Sonoma years:

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Newest reported 1994 GMC Sonoma problems

 

Verified for the GMC Sonoma

The distributor may develop internal faults. This can cause a rough running engine or stalling condition and the Check Engine Light may or may not illuminate. The distributor should be overhauled or replaced to correct this concern.

6 Reports
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Verified for the GMC Sonoma

The intake manifold gasket may develop and external engine oil or coolant leak. In some cases, an internal coolant leak may occur causing coolant to mix with the engine oil. Running the engine with a coolant/oil mix may result in engine damage. Replacing the intake manifold gasket should correct this issue.

9 Reports
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Verified for the GMC Sonoma

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.

5 Reports
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Verified for the GMC Sonoma

A door window may move slowly or stop in mid travel due to a failing power window motor. The affected window may start working again after the motor cools off. Replacing the faulty window motor will commonly correct this concern.

13 Reports
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Verified for the GMC Sonoma

An engine oil leak may develop from the distributor shaft o-ring seal.

7 Reports
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Verified for the GMC Sonoma

A fluid leak may develop from the transmission output shaft seal. This leak may cause the transmission mount to become oil soaked and require replacement of the mount along with the leak repair.

9 Reports
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Verified for the GMC Sonoma

The electrical contacts in the ignition switch may fail and result in erratic instrument panel gauge operation or illumination of the Check Engine Light. A failed ignition switch will require replacement.

9 Reports
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Verified for the GMC Sonoma

4.3L V6 multi-port FI only
The exhaust gas recirculation valve (EGR) may stick open causing a rough idle and the Check Engine Light to illuminate. Our technicians tell us that a piece of carbon may become stuck in the valve causing this problem. Cleaning the valve will usually correct this condition, in some rare cases the valve will need to be replaced.

3 Reports
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Verified for the GMC Sonoma

The heater core under the right side of the dashboard may leak engine coolant which can puddle on the passenger front floor. The loss of coolant may cause an engine overheating condition. Our technicians tell us that removal of the dash board is necessary to replace the heater on these vehicles.

16 Reports
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Verified for the GMC Sonoma

A coolant leak may develop from the water pump. This can result in an engine overheating condition. A leaking water pump will require replacement.

5 Reports
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Verified for the GMC Sonoma

On vehicles with intermittent windshield wipers, the wiper motor circuit board may fail and cause the wipers to stop working at times. Replacing the circuit board should resolve the issue. Some vehicles were recalled for this problem and some were not. You will need to check with your local dealer to find out if a specific vehicle was included.

8 Reports
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Verified for the GMC Sonoma

The Anti-lock brake system (ABS) control unit may fail internally causing the ABS warning light to illuminate.

44 Reports
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Verified for the GMC Sonoma

The power door locks may stop working in one or more doors due to a failed actuator. Replacement of the failed actuator should correct this concern.

13 Reports
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Verified for the GMC Sonoma

The fuel pump may fail causing the engine to stall and not restart. Our technicians recommend replacing the fuel filter every 30,000 miles to help prevent undue strain on the fuel pump.

22 Reports
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Reported by Jim Taddei for the GMC Sonoma

Water was leaking onto the drivers floor. Replacing the drivers door weather strip corrected the problem.

1 Report
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