NHTSA recall 15V145000

What's wrong: If the driver exits the vehicle without turning off the electrical system, the battery may drain low enough that the gasoline engine will automatically start itself to recharge the electric battery.

Why it matters: If the engine runs for an extended period of time in an enclosed space, there may be a build up of carbon monoxide, increasing the risk of personal injury.

The fix: Gm will notify owners, and dealers will update the engine management software to limit the time that the stationary vehicle can be left in the on position, free of charge. The recall began April 15, 2015.