1990 GMC 2500 Pickup Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1990 GMC 2500 Pickup
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1990 GMC 2500 Pickup ProblemsPower 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.
The power door lock actuators may become slow to operate or stop working completely and require replacement.
1990 GMC 2500 Pickup Questions82 k2500 won't start after oil line blew, afree adding oil engine will not crank over (1 answer)
I have a 1990 GMC Sierra and I want to know if the bolt pattern will match onto a 1980 GMC . motors are both 350's
flushed the system, replace orifice tub, added 3 oz Pag 100 oil to new compressor, put the rest of the 8oz in accumulator, vacumed for 45 minutes. Added 1 can of r134a, compressor began cycling with short clutch runs. Low side pressure increased to 100, high side never got above 50. Removed co...