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#09-00-89-029K: Key Cutting Procedure for Obtaining Replacement Key - (Jun 27, 2013) Keys and Keyless Entry
Subject:Key Cutting Procedure for Obtaining Replacement KeyModels: 2010-2014 Buick LaCrosse2011-2014 Buick Regal2012-2014 Buick Verano2010-2014 Cadillac SRX2013-2014 Cadillac ATS, XTS2010-2014 Chevrolet Camaro, Equinox2011-2013 Chevrolet Caprice PPV2011-2014 Chevrolet Cruze, Volt2012-2014 Chevrolet ...