Keyless Entry Transmitters
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
The keyless entry transmitters are used to lock and unlock the vehicle door while away from the immediate area of the vehicle. The keyless entry system will operate at a distance of up to 60 m (195 ft) away, except for Japanese and South Korean vehicles, which are limited to 4 m (16 feet). Up to 8 transmitters may be programmed to a single vehicle.