Keyless Entry Transmitters
WARNING: This page is about a different car, the 2011 GMC Canyon and 2011 Chevrolet Colorado. 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 are of the vehicle. Transmitters will operate at a distance of up to 20 m (65 feet), except Japanese and South Korean vehicles, which are limited to 4 m (13 feet). Up to 4 transmitters may be programmed to a single vehicle.