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 ProblemsQuick-connect fittings for heater hoses may leak engine coolant
The quick-connect fittings for the heater hoses tend to leak engine coolant. This problem commonly occurs because the metal housing has become brittle, which can break and cause leaks.
The alternator may fail causing the battery to go dead, or an abnormal noise may develop. The dash warning light may or may not illuminate. A failed alternator will 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...