GMC Questions Maintenance & Repair

Heat/Air System Has No Power At All

I have a 2005 GMC Yukon Denali XL. The entire heating/AC system for the front does not have any power to it. There is no display, no lights, doesn’t even turn on. The rear system works fine althou...

No Air Coming Out AC Vents

I have a 1999 GMC Jimmy I replaced the blower motor and resistor and it's still not working any ideas? it is under the hood. Could it be the resistor connector

2007 GMC Yukon XL 2500 Radio Whine

I just purchased a 2007 Yukon XL 2500 with a Factory DVD. It has a whine in the speakers all throughout the car. It happens if the radio is on or if the blinkers are on. I know the blinkers run thro...

My Door Will Not Unlock Or Open Driver Side

my door will not unlock or open driver side, i tried the key from outside and also the key fob and from the inside door handle ,when trying to manually unlock from inside the linkage it will not mov...

Code KWP2000 On 2019 GMC Terrain Diesel. What Does That Mean?

2003 GMC SIERRA 2500 Passenger Windows Not Working

The passenger side windows stopped working. Rear passenger window is part way down. Checked all fuses and seem good unless I missed one. The 25 amp circuit breaker located under the dash gets hot. ...

Truck Will Crank But Will Not Start

Is there a fuse or a relay making my truck not wanting to start

2004 Yukon 2500 Seems To Lock Up In 4wd ??

Why Is My Master Switch Not Working

I have a 2009 GMC Sierra 1500 ext cab. When I got the truck the master switch would roll down the driver window but that’s it. Nothing else worked including other 3 windows, lock/unlock, window lo...

I Have A Dead GMC Envoy?

Hauled GMC Envoy on trailer. ran the day before. Went to move it off the trailer and the battery was dead. couldn't get it fired up so we put it in neutral while the key was in accessory position an...

Will Not Start. No Crank Or Click Yet A Spinning Noise

Went to start my SUV this morning and started to crank over then just a spinning noise. No crank over no clicking just a spinning noise that whines down after turning back key to off position

04 Envoy Transmission And Brakes

I was driving home and the transmission just went out any gear and when this happened my brakes will go all the way to the floor

Misfire 2009 Gmc Hybrid Yukon

Changed every sensor, spark plug and coal pack still has a misfire and it hesitates does anyone know how to fix this issue?

Heat Takes Turning From Cold To Hot And A Thump To Turn On?

I have to adjust the temp from low (cold) to high (hot) multiple times before the vehicle registers that I'm turning the heat on. Usually passing from 65 degrees to 73 degrees finally makes a thump ...

How To Find Heating Problem On 96 GMC Sierra 4.3L?

I have flushed the system, changed out the heating core, changed out the temp gage, changed out the driver and passenger blend door actuator and changed out the water pump. What else could it be? Al...

What Is Th Ecauses Of Electrical Issues With GMC Sierra 1500?

2018 GMC Sierra 1500 5.3l 4x4 SLE. Dash and touch screen go blank and door locks cycle with going over a bump in the road. The batter was replaced and new battery cables installed by dealership techn...

Rear Bumper Torque Specs.

I have a 2012 GMC Sierra 1500 SLT that I removed the Truck bed and rear bumper to do some body work on the bed, does anyone have the torque specs for the rear bumper? I already have the specs for th...

2007 Yukon Denali. Drivers Side Heat

Drivers side heat works when remote start is activated. When starting car with key and pressing buttons it does not.

P0303 Misfiring Cylinder

I was driving on the highway and didn't notice anything out of order until I pulled off and stopped at the stop light. The engine light was off, but my engine was idling rough. I pulled into my ho...

I Can’t Identify Wiring Underneath The Driver Seat

I am removing the front seats to fix floor rust underneath the driver seat. There’s a large box and a small box. Both of them have wiring. Some of that wiring goes into the floor of the van. I don’t...