1998 GMC Safari Owner's Manual - Page 91

The power door lock switch will lock or unlock the rear hatch and Dutch doors. See "Hatch Release" in this section. Every vehicle with power door locks has a pulse lock system. A pulse lock system works this: like If the sliding door open and you press the power door is lock switch, the sliding door will not lock immediately. After you close the door, the system comes on and, in about five seconds, locks sliding door. the All models have overriding door locks. When a door is locked, the inside door handle will not work the latch. This will help stop a door from being accidentally opened. Your keyless entry system operates on a radio frequency subject to Federal Communications Commission (FCC) If you are leaving the vehicle, take your keys, open your Rules and with Industry Canada. door and set the locks from inside. Then get out and This device complies with Part of the FCC Rules. 15 close the door. Operation is subject to the following two conditions: (1) this devicemay not cause harmful interference, Keyless Entry System (Option) and (2) this device must accept any interference If your vehicle has this option, you can lock and received, including interference that cause may unlock your doors or unlock your rear hatch from about undesired operation. 3 feet (1 m) up to 30 feet (9 m) away using the remote keyless entry transmitter supplied with your vehicle. Leaving Your Vehicle 2-7