1991 GMC Rally Wagon 2500 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1991 GMC Rally Wagon 2500
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1991 GMC Rally Wagon 2500 ProblemsDriveability Problems Due to Internal Distributor Fault
The distributor may develop internal faults. This can cause a rough running engine or stalling condition, the Check Engine Light may or may not illuminate. Our technicians tell us that the distributor should be overhauled or replaced to correct this concern.
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.
1991 GMC Rally Wagon 2500 Questionswhy does my heat blow hot in the rear.but blows out cold in the front (2 answers)
the vents in the front will blow warm air for a couple seconds then it get cool.while the rear vents blow heat all the time