1996 GMC Yukon Owner's Manual - Page 68

Keyless Entry System (Option) If your vehicle has this option, you can lock and unlock your doors oryour tailgate from up to 30 feet (9 m) away using the key chain transmitter supplied with your vehicle. Your Keyless Entry System operates on a radio frequency subject to Federal Communications Commission (FCC) Rules. This devicecomplies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: ( 1 ) This device may not cause harmful interference, and (2) This device must accept any interference received, including interference that may cause undesired operation. Should interference to this system occur, try this: Check to determine if battery replacement is necessary. See the instructions on battery replacement. Check the distance. You may be too far from your vehicle. This product has a maximum range. Check the location. Other vehicles or objects may be blocking the signal. See your GM dealer or a qualified technicianfor service. Changes or modifications to this system by other than an authorized service facility could void authorization to use this equipment. Operation To unlock the driver's door, press the UNLOCK button. If you press this button again within five seconds, all the doors will unlock. Press the REAR button to unlock the rear door only, or to release the tailgate glass. Press the LOCK button to lock all the doors. When the UNLOCK button is pushed, the interior dome lamps are turned on for 40 seconds or until the ignition switch is activated. When the LOCK button is pushed, the interior lamps are turned on for two seconds if the doors are closed. If the LOCK button is pushed when a door is open, the interior lamps will stay on for two seconds after the door is closed. 2-4