GMC Repair and Maintenance

A guide to problems, costs, maintenance and repair for your GMC

GMC Problems

Heating and AC Temperature and Air Delivery Mode Door Actuators May Fail

One or more heater & AC (HVAC) temperature and/or air delivery mode door actuator may fail, resulting in improper temperature or air delivery. If this occurs, fault code(s) should be stored in the HVAC control module which should assist in diagnoses.

The Upper Dash May Crack

The upper dash may crack, most commonly on vehicles in warm climates and exposed to a lot of sunlight. The common repair is to replace the upper instrument trim panel. Information on a technical service bulletin or extended warranty is not available at this time.

Transmission Fault and/or Check Engine Light With Code P0716, P0776, P0717, P0777, P2714, P2715, and/or P02723

Vehicles with a 6speed automatic transmission may develop one or more of the following faults related to a broken 35R clutch wave plate inside the transmission: Illumination of the Check Engine Light with code P0716, P0776, P0717, P0777, P2714, P2715, and/or P02723, loss of reverse gear, slipping or harsh 3rd or 5th gear shift. Removal and dis-assembly of the transmission will be required to replace the broken 35R wave plate. It is also extremely important that all debris from the failed part be cleaned from the transmission while it is disassembled in order to try and prevent future problems.

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GMC Questions

Why does it sound and feel like something is about to fall from the front tires (1 answer)

It makes a grinding, louder than if it were pads it also feels like something is a loose and wants to fall from up under the car when I drive it

Lost my brakes and steering at the same time (1 answer)

I lost my power brakes and power steering why would that happen

How do I remove the antenna mast on the envoy? (1 answer)

Purchases vehicle used and previous owner snapped the antenna off. Now radio is all static. Can't get the mast off because it's bolted down in such a way that I can't figure out how to remove it.

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GMC Recalls

Ignition Key May Be Removed Without Transmission Lever Shifted To Park

The ignition key may be able to be removed from the ignition switch without having the transmission shift lever securely in the park position. This could allow the vehicle to roll unexpectedly. Dealers will inspect and if necessary replace the key cylinder lock housing free of charge to resolve the concern.

Passenger Frontal Air Bag Inflator Ruptures On Deployment

The passenger frontal air bag inflator may rupture on deployment, causing metal fragments to come through the air bag and injure occupants. Dealers will replace the passenger frontal air bag inflator free of charge to resolve the concern.

Passenger Frontal Air Bag Inflator Ruptures On Deployment

The passenger frontal air bag inflator may rupture on deployment, causing metal fragments to come through the air bag and injure occupants. Dealers will replace the passenger frontal air bag inflator free of charge to resolve the concern.

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GMC Reviews

I bought my 2001 Sierra PU new in Nov. 2000. It's now June 18, 2016 - 317,000+ miles later on original motor. Notes: 1. Replaced radiator at 293,000+ miles. 2. Replaced transmission at 238,000 miles 3. Replaced alternator at around 275,000 miles. 4. Fuel pump - worst part on the truck. I've replaced 4 times at least, almost $700 a pop. It's in a funky location so it's the labor of...
I've had the vehicle for six months. It just went through its first inspection and it only needed tie rods. I consistently have check engine light issues with the gas cap and others that I am unaware of however the truck runs great. I recently installed an "innovative" power performance chip and you can definitely feel the boost . Has anyone installed a performance air intake system, if so i...
Why did my inside/outside a.c. door quit working. Button dash lights up but door does not move. 2002 GMC Sierra 2500hd duramax

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