1998 GMC Sonoma Owner's Manual - Page 71

0 Check the distance. You may be too far from your vehicle. You ]nay need to stand closer during rainy or snowy weather. 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. If you're still having trouble, see your dealer or a qualified technician for service. Matching Transmitter(s) To Your Vehicle Each remote keyless entry transmitter is coded to prevent another transmitterfrom unlocking your vehicle. If a transmitter is lost or stolen, areplacement 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 four transmitters matched to it. 0 0 Operation 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 three seconds, the remaining doors will unlock, the parking lamps will flash and the interior lights will go on. Press LOCK to lock all the doors. Press LOCK again within three seconds and the horn will chirp. Remote Panic Alarm Battery Replacement Under normal use, the battery in your remote keyless entry transmitter should last about two years. You can tell the battery is weak if the transmitter won't work at the normal range in any location. If you have to get close to your vehicle before the transmitter works, it's probably time to change the battery. 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 two minutes. This can be turned off by pressing the horn button again. waiting for 30 seconds, or starting the vehicle.