One problem related to ignition switch has been reported for the 2012 GMC Sierra. The most recently reported issues are listed below.
While moving with transmission in drive, the ignition switch can be switched off. By doing so, the power steering and brakes fail to function properly. The steering wheel will lock, not allowing to steer. There have been a safety concerns with other gm products, why not this model? this is a safety concern.
| Electrical System problems | |
| Wiring problems | |
| Ignition Switch problems |