1991 GMC 2500 Pickup Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 1991 GMC 2500 Pickup

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1991 GMC 2500 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.

Power Door Lock Actuators May Fail

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

ABS Warning Light On and/or Erratic ABS Operation

The anti-lock brake system (ABS) front wheel speed sensors are prone to failure. When a sensor fails, the ABS warning light may illuminate and/or the ABS system may activate erratically.

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1991 GMC 2500 Pickup Questions

When towing a trailer with a car do I put it in 3rd gear or in overdrive? (1 answer)

I think the question is pretty self expanitory...thank you

Blower stopped (1 answer)

I have checked the fuses inside relays and maxi fuse outside and they are all good. I get no power to the switch but I can jumper to the motor and it does spin.

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