1998 GMC Suburban Owner's Manual - Page 85

Operation To unlock the driver's door,press the UNLOCK button. The interior lamps will come on for 40 seconds or until the ignition is turned on. If you press this button again within five seconds, all the remaining doors will unlock. Press the LOCK button to lock all the doors. The interior lamps will come on for two seconds as soon as all the doors are closed. If you press the LOCK button twice the horn will chirp to confirm that the doors are locked. 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. 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. If you do not want the horn to chirp as a confirmation that the doors have locked or unlocked, please consult your dealer. The rear cargo doors or tailgate glass will unlock automatically when the REAR button on the transmitter is pressed twice within three seconds. If your vehicle is equipped with a rear liftglass, pressing the REAR button twice within three seconds will release the liftglass, but only if the transmission selector is in PARK (P). The interior lamps will come on for 40 seconds or until the ignition is turned on. NOTICE: When replacing the battery, use care not to touch any of the circuitry. Static from your body transferred to these surfaces may damage the transmitter. Use one three volt, type CR2032, or equivalent battery. Matching Transmitter(s) To Your Vehicle Each remote keyless entry transmitter is coded to prevent another transmitter fromunlocking your vehicle. If a transmitter is lost or stolen, areplacement can be 2-7