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1990 GMC Safari Problems

Find the most common issues based on 1990 GMC Safari owner complaints.
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Most Common 1990 GMC Safari Problems

The outside door handles are prone to breaking—all doors are affected by this condition.
The Anti-lock brake system (ABS) control unit may fail internally causing the ABS warning light to illuminate.
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.
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2 Known 1990 GMC Safari Brakes Problems

The Anti-lock brake system (ABS) control unit may fail internally causing the ABS warning light to illuminate.
Power brake systems using "hydro-boost" may leak power steering fluid from the hydro-boost unit located behind the brake master cylinder. Replacement of the hydro-boost unit is the common repair to...

2 Known 1990 GMC Safari Drive Train Problems

Our technicians highly recommend that the transmission is serviced every 30,000 miles to avoid problems and maintain optimal operating order.
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.

2 Known 1990 GMC Safari Electrical & Lights Problems

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.
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 mot...

8 Known 1990 GMC Safari Engine Problems

The distributor may develop internal faults. This can cause a rough running engine or stalling condition, the Check Engine Light may or may not illuminate. Our technicians tell us that the distribu...
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 wit...
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 ...

1 Known 1990 GMC Safari Exhaust & Emissions Problem

The oxygen sensor can fail, causing Check Engine Light illumination and the engine to run rich (burn more fuel than normal).

1 Known 1990 GMC Safari Heating & Air Conditioning Problem

On vans with rear AC, the AC may stop blowing cold air due to a damaged AC line near the back of the engine. It is common for these lines to rub on the engine block, causing a hole in the line and ...

1 Known 1990 GMC Safari Maintenance Problem

Brake fluid can become dirty and may cause problems in the brake system; it should be flushed every 60,000 miles.

1 Known 1990 GMC Safari Miscellaneous Problem

The outside door handles are prone to breaking—all doors are affected by this condition.

1 Known 1990 GMC Safari Suspension & Steering Problem

The idler arm, pitman arm, or center steering link may wear and cause excess play in the steering. If any of these components are replaced, the front end alignment should be checked.

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Known 1990 GMC Safari Problems & Complaints

The outside door handles are prone to breaking—all doors are affected by this condition.
The Anti-lock brake system (ABS) control unit may fail internally causing the ABS warning light to illuminate.
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 mot...
This engine may leak oil from the valve cover gasket.
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.
Power brake systems using "hydro-boost" may leak power steering fluid from the hydro-boost unit located behind the brake master cylinder. Replacement of the hydro-boost unit is the common repair to...
An oil leak may develop from the distributor o-ring seal requiring replacement of the seal.
The distributor may develop internal faults. This can cause a rough running engine or stalling condition, the Check Engine Light may or may not illuminate. Our technicians tell us that the distribu...
Our technicians highly recommend that the transmission is serviced every 30,000 miles to avoid problems and maintain optimal operating order.
Brake fluid can become dirty and may cause problems in the brake system; it should be flushed every 60,000 miles.
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.
The oxygen sensor can fail, causing Check Engine Light illumination and the engine to run rich (burn more fuel than normal).
A coolant leak may develop from the water pump. This can result in an engine overheating condition. A leaking water pump will require replacement.
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 wit...
The spark plug wire rubber boots may get soaked with oil, causing a misfire or rough idle.
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