Section 14 (Remote Keyless Entry System): Operation
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, 2002 Chevrolet Chevy Express, and 2001 GMC Savana Special. However, it is still accessible from the selected car via links, so may be relevant.
Transmitter must be within 33 feet (10 meters) of vehicle for RCDLR to detect coded signal. RCDLR will lock all doors when LOCK button is depressed once. Driver's door is unlocked when UNLOCK button is pressed on transmitter. If UNLOCK button is depressed again within 2 seconds, all remaining doors (except rear doors) will be unlocked.
When REAR 2X button is depressed 2 times, RCDLR unlocks rear door only. When any UNLOCK button is depressed, interior dome lights are turned on for 40 seconds, or until ignition switch is turned ON.