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 ExhaustTransmission Component and System Description Automatic Transmission Unit
The mechanical components of the 6T40/45/50 are as follows:A torque converter with an electronically controlled capacity clutch-(ECCC)Gear-type fluid pump assembly1–2–3–4 and low and reverse clutch housing assembly4–5–6 and 3–5 reverse clutch housing assembly2–6 clutch assemblyLow and ...