GM Service Manual Online
For 1990-2009 cars only

Keyless Entry System

The keyless entry system provides the following functions:

    • Locks the doors
    • Unlocks the doors
    • Releases the rear compartment lid of the vehicle
    • Provides sustained interior illumination

Sustained interior illumination includes a feature called theater dimming. Theater dimming slowly dims the lights at the end of the delay time. The delay time is cancelled if you turn the ignition key to RUN or START. This action will turn off the lamps.

When the ignition is ON, the sustained interior illumination is inactive. The courtesy lamps will not illuminate.

The keyless entry system operates on a frequency that is subject to Federal Communications Commission (FCC) rules. The device complies with Part 15 of the FCC Rules. Operation of the device is subject to the following 2 conditions:

    • The device may not cause harmful interference.
    • The device must accept any interference that it receives, including interference that may cause undesired operation.

Keyless Entry Transmitter


Object Number: 294442  Size: SH

The transmitter is a hand-held device that has three buttons. The buttons commands the functions of the system. The transmitter sends a radio signal to the receiver, which helps carry out the functions of the keyless entry system.

The range of the transmitter is about 1-10 m (3.2-33 ft). The range may decrease at times. This is normal for any remote control lock system.

Complete the following steps if the transmitter does not operate or if you must stand closer to the vehicle in order to operate the transmitter:

    • Determine if the battery requires replacement.
    • Determine if you are standing too far from the vehicle. You may need to stand closer during rainy or snowy weather.
    • Determine if other vehicles or objects are blocking the signal. Take a few steps to the left or the right.

Keyless Entry Receiver

The keyless entry receiver is mounted on the rear package shelf. The receiver is powered through the vehicle's wiring harness. When the correct transmitter signal is received, the transistor driver within the receiver will energize the correct relay coil. The receiver will also control which relays will be energized. This determines whether the driver's door or all of the doors will open. The receiver also controls the illumination of the courtesy lamp.