1990 GMC Jimmy Questions

Unanswered 1990 GMC Jimmy Questions

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Wen warming up the truck, every time, morning, afternoon and night, the idle goes up and down for about 5 minute or till warm up. It doesn't have trouble starting and runs great after warm up. No codes or check engine...
so I bought a new battery for it and when I turn the ignition switch to turn the vehicle on it doesn't want to start the battery voltage is good a little pressure is good but the vehicle itself will not turn over
thanks for the responce oakman...i went thru the panel originally, but with the window up, the motor mechanism is in the way of the two screws on the cylinder. the does tailgate come apart somehow or do i have to tak...