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 Exhaust#07-02-32-002N: Hydraulic Power Steering System Leak - Required Diagnostic Actions - (Sep 18, 2013) Hydraulic Steering
Subject:Hydraulic Power Steering System Leak – Required Diagnostic ActionsModels: 2005-2014 GM Cars and TrucksEquipped with Hydraulic SteeringThis bulletin has been revised to add the 2014 model year and to change the tool requiredto remove the steering line fitting seals. Please discard Corporat ...