GMC · Canada · Crit
GMC Sierra, Yukon XL +1 more: Powertrain
Affects GMC Sierra, Yukon XL, Yukon · 2014–2015 — about 54K vehicles.
The hazard
Certain vehicles equipped with an Automatic Transfer Case may have a condition in which an electric signal short may cause the transfer case to switch to neutral without operator input. The transfer case mode selection knob would still indicate the last selected drive mode, but the driver would not have any feedback that the transfer case is in neutral. If the transfer case switches to neutral while the vehicle is in motion, the driver would experience a loss of motive power and, if the vehicle is parked without the parking brake applied, the vehicle could roll away. Both scenarios could result in a crash causing injury and/or damage to property. Correction: Dealers will re-program the software of the Transfer Case Control Module.
What to do
Contact your dealer; the remedy details were not included in the filing.