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GMC » Sonoma » 1993 GMC Sonoma » Car Problems

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1993 GMC Sonoma Problems

ABS Light Due to Brake System Control Unit Failure

for the GMC Sonoma

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

28 Reports

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Coolant Leak From Heater Core

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.

15 Reports

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Power Door Locks Stop Working

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.

12 Reports

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Power Window Motor May Fail

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.

9 Reports

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Check Engine Light and Erratic Gauge Operation

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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Intake Manifold Gasket May Leak Coolant or Engine Oil

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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Transmission Leak From Output Shaft Seal

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.

8 Reports

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Oil Leak From Distributor Shaft Seal

for the GMC Sonoma

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

6 Reports

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Coolant Leak & Engine Overheating

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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Failed alternator can cause "no charge" condition

for the GMC Sonoma

The alternator may fail, causing a "no charge" condition. An internal bearing may also fail and cause an abnormal noise. If the vehicle is driven too long with a failed bearing, the alternator may stop turning, which can cause the serpentine belt to break or the engine to stall and not turn over.

5 Reports

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Engine Running Rich Due to Fuel Leak Inside Intake Manifold

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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Driveability Problems Due to Internal Distributor Fault

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.

5 Reports

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