GMC Envoy Questions

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It's a very faint knocking noise, sounds like it's coming from rear passenger wheel well.
it works as should at 70mph but not at 75.
The indicator light shows the shift, but it remains in 2wheel drive. What should I do to correct it?
Changed fuel pump relay switch had wiring & crankshaft repaired by GMC DEALER it work for three weeks now it want start
What could be the problem? And, approximately how much to fix?
How do we fix it. All other windows work fine. We push it up by hand n stays till we start driving again
It is the entire ceiling that opens so the SUV can be used as a truck. Could this be a fuse?
is it a fuse that could be out.
At first I thought I had a motor mount gone, causing the fan blade to hit the fan shroud as the engine lifted up from a bad motor mount. The noise was very similar, and was coming from the same location, but I narrow...
The oil pressure guage is pegged at 80, even with the engine off. Is this just a sensor issue, or something else?
warning lights are coming on for stabilitrac system. we have observed it happnes mostly whenever we get the car washed or when it rains.
My car leaks when it rains if it is on level ground. If I park uphill it doesn't leak. Water comes through the onstar buttons or the driver visor screw.
Mistakenly told it was rack & pinion. luckily transmission fluid almost ran out before the repair date. So the leak was trans fluid not steering fluid as diagnosed. What line is leaking?
Drove it a few miles but when I tapped my brakes in traffic I could not reset the cruise?
I was accelerating onto high way heard twing noise and now space shuttle taking off
The hum occurs at various times and may not occur for several days then start up out of the clear blue. We had the Envoy up to GMC Dealer when it was in warranty and they have for 3 days trying to figure this out and ...
Before I start the car the dimmer works great but after I drive it a while they go out when I dim the lights
JUST STARTED,WENT TO THE STORE AND PARKED. CAME OUT STARTED IT AND WOULDN'T SHIFT PLAYED AROUND WITH IT AND GOT IT TO SHIFT. BROUGHT IT HOME AND PARKED. TRYED TO SHIFT IT OUT OF PARK AGAIN. SHIFT LEVER WOULD NOT SHIFT...