1994 GMC Sonoma Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 1994 GMC Sonoma

1994 GMC Sonoma Problems

Power Window Motors May Fail From Overheating

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.

Intake Manifold Gaskets May Leak Coolant or Engine Oil

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.

Engine Running Rich Due to Fuel Leak Inside Intake Manifold

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.

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1994 GMC Sonoma Questions

replaced clutch master cyl & slave cyl.still get air & no pedal after bleeding (1 answer)

Looking at a 94 sonoma. Has some issues. Need to know if it's worth it. (1 answer)

Got minimal information from the guy. He didn't really seem to know about the truck itself. He does know what's wrong with it. There's some rust in the rear left wheel well, not sure how bad it is, haven't seen it yet. The front wheels in the 4 wheel drive are not engaging. He had...

I'm driving across country and yesterday my truck started sputtering. (2 answers)

My truck feels like its miss firing and ist sputters. What could cause this? No other problems at all.

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1994 GMC Sonoma Recalls

Recall 99V193000
VEHICLE DESCRIPTION: CERTAIN 4-WHEEL DRIVE PICKUP TRUCKS AND SPORT UTILITY VEHICLES EQUIPPED WITH ABS (ANTILOCK BRAKING SYSTEM) MANUFACTURED FROM SEPTEMBER 1989 THROUGH AUGUST 1996. UNDER CERTAIN DRIVING CONDITIONS THE SWITCH WHICH SIGNALS THE ABS SYSTEM WHETHER THE VEHICLE IS IN 2-WHEEL OR 4-...
Recall 99I006000
THIS IS NOT A SAFETY RECALL IN ACCORDANCE WITH THE SAFETY ACT. HOWEVER, IT IS DEEMED A SAFETY IMPROVEMENT CAMPAIGN BY THE AGENCY. VEHICLE DESCRIPTION: CERTAIN LIGHT DUTY PICKUP TRUCKS, SPORT UTILITY VEHICLES, OR MINIVANS EQUIPPED WITH 3-SENSOR ABS (ANTILOCK BRAKING SYSTEM) EBC4 UNITS.
Recall 97V096001
VEHICLE DESCRIPTION: EXTENDED CAB PICKUP TRUCKS EQUIPPED WITH 60/40 FRONT BENCH SEATS AND EXTENDED CAB PICKUP TRUCKS AND 2-DOOR UTILITY VEHICLES EQUIPPED WITH MANUAL LOCKING RECLINER BUCKET SEATS. THE OUTBOARD SAFETY BELT WEBBING ON THE DRIVER'S AND/OR PASSENGER'S SEAT CAN SEPARATE DURING A FRO...

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1994 GMC Sonoma Reviews

My 4wd Sonoma has been an excelent truck. The engine has a bit of a rough idle (from new) but runs strong and gets OK gas mileage. Front brakes wear out on the early side and now I have developed a noise in the front end, maybe worn control arm bushings. The only major repair has been a fuel pump replacement at 70k.

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