2010 GMC Sierra 1500 Crew Cab Owner's Manual - Page 146

Do not use the remote start feature if your vehicle is low on fuel. Your vehicle may run out of fuel. If your vehicle has the remote start feature, the RKE transmitter functions will have an increased range of operation. However, the range may be less while the vehicle is running. There are other conditions which can affect the performance of the transmitter, see Remote Keyless Entry (RKE) System on page 3‑4 for additional information. / (Remote Start): This button will be on the RKE transmitter if you have remote start. To start the vehicle using the remote start feature: 1. Aim the transmitter at the vehicle. 2. Press and release the transmitter's lock button. The vehicle's doors will lock. Immediately press and hold the transmitter's remote start button until the turn signal lights flash. If you cannot see the vehicle's lights, press and hold the remote start button for two to four seconds. Pressing the remote start button again after the vehicle has started will turn the engine off. When the vehicle starts, the parking lamps will turn on and remain on while the vehicle is running. If the vehicle is left running it will automatically shut off after 10 minutes unless a time extension has been done. 3. If it is the first remote start since the vehicle has been driven, repeat these steps, while the engine is still running, to extend the engine running time by 10 minutes. Remote start can be extended one time. After entering the vehicle during a remote start, insert and turn the key to RUN to drive the vehicle. To manually shut off a remote start, do any of the following: . Aim the RKE transmitter at the vehicle and press the remote start button until the parking lamps turn off. Turn on the hazard warning flashers. Turn the ignition switch on and then off. . . 3-8