1991 GMC Sonoma Repair and Maintenance

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

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1991 GMC Sonoma Problems

The Fuel Pump May Fail Causing the Engine to Stall or Crank Over But Not Start

The fuel pump may fail causing the engine to stall and not restart. Our technicians recommend replacing the fuel filter every 30,000 miles to help prevent undue strain on the fuel pump.

Coolant Leak From Heater Core

The heater core under the right side of the dashboard may leak engine coolant which can puddle on the passenger front floor. The loss of coolant may cause an engine overheating condition. Our technicians tell us that removal of the dash board is necessary to replace the heater on these vehicles.

Driveability Problems Due to Internal Distributor Fault

The distributor may develop internal faults. This can cause a rough running engine or stalling condition and the Check Engine Light may or may not illuminate. The distributor should be overhauled or replaced to correct this concern.

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1991 GMC Sonoma Questions

My 1991 gmc sonoma 4.3 liter is loosing too much water (1 answer)

and I don't know why i just had my heads and my throttle body redone it was blowing clouds of white smoke every time I turned it on or let it sit while running now it does it only when it's cold or low on water.... need some ones opinion !

My ignition is stuck in the locked position. Is it an easy fix? (1 answer)

I just bought the truck. I started it just about 2 weeks before I bought it, it ran fine. I go to start it after I bought it and the ignition is stuck in the locked position. I can't move any of the pieces. Not even the unlock switch.

Driver side door "drops" when opened. (1 answer)

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1991 GMC Sonoma Recalls

Recall 99V193000
VEHICLE DESCRIPTION: CERTAIN 4-WHEEL DRIVE PICKUP TRUCKS AND SPORT UTILITY VEHICLES EQUIPPED WITH ABS (ANTILOCK BRAKING SYSTEM) MANUFACTURED FROM SEPTEMBER 1989 THROUGH AUGUST 1996. UNDER CERTAIN DRIVING CONDITIONS THE SWITCH WHICH SIGNALS THE ABS SYSTEM WHETHER THE VEHICLE IS IN 2-WHEEL OR 4-...

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1991 GMC Sonoma Reviews

Rated
based on 2 customer reviews
Good truck have broken it in with 453,000 on it . All original motor 4.3 just keeps going and going. Passes emish with flying colors. Just keep them cool and tuned and run super in it will last for ever.
This truck is dependable for work use for me. I replaced the engine in this and at the same time replaced the transmission with the correct one. The image here is not the same type as mine as mine is a swb with a regular cab. Has a 5 speed transmission with a 2.5L engine in it.

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