1990 GMC 3500 Pickup Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 1990 GMC 3500 Pickup

1990 GMC 3500 Pickup Problems

Power Brake Units May Leak Fluid From Hydro-Boost Unit

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 correct this concern.

Inside/Outside Door Handles May Break

The inside and outside door handles are prone to breaking.

Power Door Lock Actuators May Fail

The power door lock actuators may become slow to operate or stop working completely and require replacement.

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1990 GMC 3500 Pickup Questions

Why would my tranny quit working all the sudden its automatic 1977 (1 answer)

WHY my FRONT BRAKES keep getting jammed up ??? (1 answer)

Greetings and help !; I have a 1990 GMC K3500HD 4WD lifted with a 454 engine. Front brakes tend to jam and heat up when it goes into operational temperature. Already replaced calipers, pads, discs and hoses (custom because of lift). WHEN we test it, it works OK but when it gains operational tempe...

no feul to the engine (1 answer)

keeps blowing the computer fuse without the key on and no feul to the engine. Will start if dump gas down the carb 1988 vandura 3500

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