Three problems related to equipment have been reported for the 2012 GMC Sierra. The most recently reported issues are listed below.
Passanger front door handle failure. Loud noise was heard upon closing of the door. Door handle pull clear from the door. Window cannot be rolled down and internal door handle is inoperable.
2012 GMC denali. Consumer writes in regards to vehicle steering problems. The consumer noticed a very bad problem with the steering whenever he slowed down to turn, he would loose control over the ability to turn. The wheel locked down when he applied the brake and tried to turn at the same time. He was not able to turn until he pressed on the accelerator or released the brake. The dealer said it was caused by the power booster taking all the power to the brakes and leaving very little to the steering. Also, there was a problem with the back-up screen. The picture was extremely dark, and it was hard to make out the images on the screen. The dealer tried to lighten the screen, but to no avail.
After exiting interstate lost steering and brakes briefly in parking lot. Pumped brake and both returned after a hissing sound. Recurred a few times in next 6 months or so. Then, in the fall of 2013, lost steering and brakes on I-49/us71b heading south from joplin, missouri. You could pump the brakes and briefly regain, but for the most part all steering and brakes were out. Took truck to GMC dealer where purchased new in bentonville. Dealer confirmed no steering and brakes and damaged bumper while vehicle in its possession by bumping into parking lot barrier. Dealer diagnosed power steering pump problem and indicated that brakes and power steering are tied to same pump/system. Dealer replaced pump but said that even though it was a two or three part system could only replace the pump. Truck continued to have problems and was taken back to dealer following similar episode where lost both steering and brakes. Dealer refused to do anything to replace the other components because could not replicate the problem. Dealer claimed no notice of any other complaints of this nature form gm or any other source. We pleaded with the dealer about it being a safety issue and asked that the dealer replace the other components it identified as possibly related. Dealer took no further action claiming without gm telling them to look further and pay for it they could do nothing else. Truck continues to have problems intermittently. It is nonsensical for a truck to have two significant safety systems tied together with no secondary support or fail safe system to guarantee that operator still have brakes and steering at all times. Truck also has rattles consistent with the service letters / issues noted on this website.
| Carrier/rack problems | |
| Equipment problems |