1990 GMC S15 Jimmy Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1990 GMC S15 Jimmy
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1990 GMC S15 Jimmy ProblemsElectrical Contacts in the Ignition Switch May Fail
The electrical contacts in the ignition switch may fail and result in erratic instrument panel gauge operation or illumination of the Check Engine Light. A failed ignition switch will require replacement.
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.
The transmission output shaft seal may leak transmission fluid. On 2WD models, this leak can cause the transmission mount to become oil soaked, which will require replacement of the mount along with the leak repair. On 4WD models, if this seal leaks, the fluid will leak into the transfer case, causing it to become overfull.
1990 GMC S15 Jimmy QuestionsHow do I change the break switch, what does it look like, and where exactly is it located on a 1989 S15 Jimmy? (1 answer)
I brought a part but It doesn't seem like right part. It's long, with two terminals on one endend, and a threaded end with plunger. The same switch is on the front of my break shaft not the back, that's why I think I might have the wrong part.
We replaced wires and plugs already. It showed no warning b4 it died. Just didn't start back up one day.
Checked fuse, i am getting continuity up through the push button on turn signal lever, replaced small black box under dash, left of steering colmn. i have great vacuum to throttle actuator. please help!