2000 GMC Safari Owner's Manual - Page 84

At times you may notice a decrease in range. This is normal for any remote keyless entry system. If the transmitter does not work or if you have to stand closer to your vehicle for the transmitter to work, try this: D Check the distance. You may be too far from your vehicle. You may need to stand closer during rainy or snowy weather. D Check the location. Other vehicles or objects may be blocking the signal. Take a few steps to the left or right, hold the transmitter higher, and try again. D Check to determine if battery replacement or transmitter resynchronization is necessary. See the instructions that follow. D If you're still having trouble, see your dealer or a qualified technician for service. REAR 2X: When you press the REAR button twice within five 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. Remote Panic Alarm When the button with the horn symbol on the key transmitter 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 horn button again, waiting for 30 second, 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 only two transmitters matched to it. Operation UNLOCK: When you press UNLOCK, the driver's door will unlock automatically, the parking lamps will flash and the interior lights will go on. If you press UNLOCK again within five seconds, all doors will unlock, the parking lamps will flash and the interior lights will go on. LOCK: Press LOCK to lock all the doors. Press LOCK again within five seconds and the horn will chirp. 2-9