1990 GMC Rally Wagon 2500 Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 1990 GMC Rally Wagon 2500

1990 GMC Rally Wagon 2500 Problems

Flush brake fluid every 60,000 miles

Our technicians recommend flushing the brake fluid every 60,000 miles.  Brake fluid that is dirty may cause problems in the brake system.

Service transmission every 30,000 miles
Our technicians highly recommend that the transmission is serviced every 30,000 miles to avoid problems and maintain optimal operating order.
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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1990 GMC Rally Wagon 2500 Questions

need heat (2 answers)

I just changed our heater fan and i get air but no heat just air

Where and how to replace transmission pump seal? (1 answer)

I actually have a 1984 GMC Rally STX, but I figure the vehicle and years are close enough. Where can I purchase a used/new pump seal for my Turbo 700R4 transmission?

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1990 GMC Rally Wagon 2500 Reviews

Got a 1 owner 1988 5.7L GMC Van from my GF's father who passed away. 85,000 miles and would still look new if it wasn't for the paint fading. This thing runs great and everything works, I love it. Her dad maintained this thing well.

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