GM Service Manual Online
For 1990-2009 cars only

Keyless Entry Functions

    • Remote driver door unlock: The driver's door unlock when pressing the unlock button on the keyless entry transmitter.
    • Remote all door unlock: All doors unlock when pressing twice (or more) the unlock button on the keyless entry transmitter.
    • Remote all door lock: All doors lock when pressing the lock button on the keyless entry transmitter.
    • Rear compartment lid release: The rear compartment lid opens when pressing the rear compartment button on the keyless entry transmitter.
    • Remote activation verification: The headlamps flashes and/or the horn sounds when using the keyless entry transmitter.
    • Remote alarm: The headlamps flashes and the horn sounds alternately for two minutes when pressing the alarm button on the keyless entry transmitter. Pressing the alarm button again within two minutes stops the remote alarm.

Remote Driver Door Unlock

The RCDLR sends a message to the BCM through the keyless entry communication link circuit  to unlocks the driver's door upon pressing once the unlock button on the keyless entry transmitter.

Remote All Door Unlock

The RCDLR sends a message to the BCM through the keyless entry communication link circuit to unlock all doors upon pressing twice (no more than 5 seconds between presses) the unlock button on the keyless entry transmitter.

Remote All Door Lock

The RCDLR sends a message to the BCM through the keyless entry communication link circuit to lock all doors upon pressing twice the lock button on the keyless entry transmitter. However, the automatic door locks controls door locking as follows:

    • The BCM will not lock the doors when the lockout prevention feature is active.
    • The BCM delays door locking when the last door closed locking feature is active.

Remote Alarm

When pressing the panic button on the keyless entry transmitter, the RCDLR send a message to the BCM on the keyless entry communication link to flash the headlamps and sound the horn alternately for two minutes. The BCM switches ground on and off to the horn relay control circuit. The horn relay will turn on an off making the horns turn on and off. The BCM also switches ground on and off to the headlamp relay control circuit. The Headlamp relay will turn on and off making the headlamps turn on and off.

Rear Compartment Lid Release

When pressing the rear compartment button on the keyless entry transmitter, the RCDLR sends a message to the BCM on the keyless entry communication link. The BCM supplies voltage to the rear compartment lid lock release actuator feed circuit, which energizes the rear compartment lid lock release actuator, releasing the rear compartment lid.

If the transaxle is shifted out of PARK, voltage supply to the rear compartment lid release actuator feed circuit is interrupted. This action disables the rear compartment lid release feature.