See also:

Universal Remote System Operation
Press and hold the appropriate button for at least half of a second. The indicator light will come on while the signal is being transmitted. ...

Vehicle and Power Issues
OnStar services require a vehicle electrical system, wireless service, and GPS satellite technologies to be available and operating for features to function properly. These systems may not operate if ...

Tow/Haul Mode
Pressing this button at the end of the shift lever turns on and off the Tow/Haul Mode. This indicator light on the instrument panel cluster comes on when the Tow/Haul Mode is on. Tow/Haul is a f ...