2006 GMC Envoy Questions

All 2006 GMC Envoy Questions

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My battery was recently changed. Never had problem with air. Now My air conditioning blows cool air in back on feet and defroster but not face. I tried taking battery off to reset. Can you please help me not sure what...
Every time I replace the fuse, when I start my car you hear a loud snap.
It happens every time driven, it may go a few miles or 20 miles. Has happened 4 to5 times in 10 miles. All engine lights for codes come on and one large light shaped like an engine. Had a diagnostic computer hooked to...
The check engine light is on and will start to flash then the car stalls out. When restarted it idles very rough and the tach hand will bounce around. To keep it running I have to put in park and keep foot on gas to k...
Had the vehicle for exactly 6 days i have been the only driver i know I didn't drive in 4 high but the dealer is saying when he picked up the truck it was in 4 high.Given him the benefit of the doubt if it was in 4 hi...
The indicator light shows the shift, but it remains in 2wheel drive. What should I do to correct it?
What could be the problem? And, approximately how much to fix?
The oil pressure guage is pegged at 80, even with the engine off. Is this just a sensor issue, or something else?