It is better not to park with the vehicle running. If the vehicle is left while running, follow the proper steps to be sure the vehicle will not move and there is adequate ventilation.
See Shifting Into Park and Engine Exhaust.
If the vehicle is left parked while running and the Remote Keyless Entry (RKE) transmitter is outside the vehicle, the vehicle will turn off after one hour. If the vehicle is left parked while running and the RKE transmitter is inside, the vehicle will turn off after two hours.
The timer will reset if the vehicle is taken out of P (Park) while it is running.
Shifting out of Park
Engine ExhaustTires and Wheels Description and Operation (Equipment) Wheels
GM Recommended Tire BalancerHunter RF33 Road Force balancer or equivalent with thefollowing options:Auto Clamp – allows for centering repeatability andprevent damage to the wheel.Wheel Lift – helps prevent wheel damage and assistsin the accuracy of the placement to the collet.Laser System for We ...