1991 GMC Vandura 2500 Repair and Maintenance

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

1991 GMC Vandura 2500 Problems

Intake Manifold Gaskets May Leak Coolant or Engine Oil

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.

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.

Distributor Shaft O-Ring Seal May Leak Oil

An oil leak may develop from the distributor o-ring seal requiring replacement of the seal.

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1991 GMC Vandura 2500 Questions

I am having an issue starting. Seems to be a spark problem. Second issue (2 answers)

Okay...so two weeks ago I received this van from a friend. It has been sitting since july 2014. I was driving from Cocoa Beach, Fl to Jacksonville, Fl...the van died after about 120 miles. All symptoms pointed to a fuel problem.

Well I played the throw parts at it until it runs and this is ...

how do I adjust rear bands on THM700R4. (1 answer)

My reverse stopped working. I only have 42,000 miles and drive works great. (1 answer)

Reverse acts and feels like it wants to work, but doesn't.

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1991 GMC Vandura 2500 Reviews

Just got it about half a year ago and I think it runs great and all I have had to do is normal tune up oil,air filter, spark plugs, break pads, drums, calipers, rotors, some new fuses and I am going to get some new rugs for it but the ones in it are still good. And yes that looks like a lot but It only cost about 250 if you do it your self and go to advance auto parts and most of the parts like...

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