1991 Chevrolet 3500 Pickup Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 1991 Chevrolet 3500 Pickup

1991 Chevrolet 3500 Pickup Problems

Transmission Fluid Leak, Erratic Shifting

On the 4L80-E Transmission (Diesel and 7.4L gas engine), Transmission fluid may leak through the electrical connector on the side of the transmission, damaging the wire harness and causing the transmission to shift erratically. Our technicians tell us there are updated shift solenoids, an internal  transmission harness, and a connector pigtail available to correct this fault.

Air Conditioning Compressor May Become Noisy

The air conditioning compressor may develop an abnormal noise and require replacement. We recommend that whenever an AC compressor is being replaced for a noise condition, a filter kit should be installed to prevent any metal particles in the system from damaging the new compressor.

Idling Problems Due to Vacuum Leak in Throttle Body Gasket

An engine vacuum leak may develop from the throttle body gasket causing a higher than normal idle speed. Failed gaskets should be replaced.

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1991 Chevrolet 3500 Pickup Questions

No brake lights (2 answers)

Replaced the switch have followed the wires from cab to lights running down the frame cannot find any shorts that way. Any ideas on where to go now

how to remove rear brake drum from 1991 chevy 3500 (1 answer)

8 bolts all have been removed but drum won't come off. help

my truck is overheating and blowing out white smoke (1 answer)

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1991 Chevrolet 3500 Pickup Reviews

I brought this truck with 70,000 miles, I now have over 190,000 and it still works great even with it getting old.

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