2003 GMC Safari Owner's Manual - Page 84

Remote Keyless Entry System Operation If your vehicle has feature, you can lock and unlock this your doors from about feet (1 m) up to 30 feet (9 m) 3 away using the remote keyless entry transmitter supplied with your vehicle. UNLOCK: When you press UNLOCK, the driver's door will unlock automatically, the parking lamps willflash and the interior lights will go on. LOCK: Press LOCK to lock all the doors. Press LOCK again within three seconds and the horn will chirp. REAR 2X: When you press the REAR button twice within three seconds to unlock the rear hatch or cargo doors, the parking lamps will flash and the interior lights will go on. If the engine is running, the automatic transmission must be in PARK (P) or NEUTRAL (N) for the REAR 2X button to operate. & (Panic Alarm): When this button is pressed, the horn will sound and the headlamps and taillamps will flash for up to 30 seconds. This can be turned off by pressing the panic button again, waiting for 30 seconds, or starting the vehicle. Matching Transmitter(s) to Your Vehicle Each remote keyless entry transmitter is coded to prevent another transmitter from unlocking your vehicle. If a transmitter is lost or stolen, a replacement can be purchased through your dealer. Remember to bring any remaining transmitters with you when you go to your dealer. When the dealer matches the replacement transmitter to your vehicle, any remaining transmitters must also be matched. Once your dealer has coded the new transmitter, the lost transmitter will not unlock your vehicle. Each vehicle can have a maximum of four transmitters matched to it. I If you press UNLOCK again within three seconds, all doors will unlock. 2-5