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...
There are two line's is one a return and only leaks while running
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
When i turn the knob to the off position on the A/C it wilnot stop blowing no matter what
Also, a lifter starts to knock. What could be the problem? This happens everyime it is driven.
am getting fluid at wheels but no brake action. abs unit has been bypassed but still no brake pedal. should not such a bypass produce standard power brake systeme
I was going to repair the seat belt myself, but the retractor is locked and I do not know how to unlock it.
my power locks do not work as for my power seat does not either.but everything else is fine.cannot open the doors with the power switch on the inside anyone no why.
my power locks do not work as for my power seat does not either.but everything else is fine.cannot open the doors with the power switch on the inside anyone no why.
this just started and doesnt do it all the time, wondering if it is the rear end going out or could possibly be something else?
Having a few problems that started and need advice! What to deal with first & where to go? 1. For about a week or 2, I can't shift out of park for a minute or 2 when it's cold & has sat for a few hours, then it's fi...
just trying to figure out what might fix the problem? is it a big job ? expensive ?
stop cooling come on but keep stopping
replacement of bearrings on the ring and pinion gear.
I replaced the blend door motor on my 98 jimmy and when I plug it it and watching it before I put it in place ,it cycles back and forth nonstop while the key is on, what is the problem/