GM Service Manual Online
For 1990-2009 cars only

The keyless entry system is a supplementary vehicle entry device. Use the keyless entry system in conjunction with a door lock key. Radio frequencies or discharged batteries may disable the system. Therefore, always carry a door lock key.

Keyless entry allows you to operate the following components:

    • The door locks
    • The rear compartment lid release
    • The illuminated entry lamps
    • The fuel door release

The keyless entry system has the following main components:

    • The transmitters
    • The body control module (BCM)

When you press a button on a transmitter, the transmitter sends a signal to the BCM. The BCM interprets the signal and activates the requested function.

Unlock Driver's Door Only

Momentarily press the UNLOCK button in order to perform the following functions:

    • Unlock the driver's door only.
    • Illuminate the interior lamps for approximately [40 seconds] or until the ignition is turned ON (if the sun sensor senses sufficient darkness).
    • Flash the park lamps.
    • Disarm the content theft deterrent (CTD) system (if equipped).

Unlock All Doors (Second Operation)

Momentarily press the UNLOCK button a second time (within 5 seconds of the first press) in order to perform the following functions:

    • Unlock the remaining doors.
    • [Illuminate the interior lamps for approximately [40 seconds] or until the ignition is turned ON].
    • Flash the park lamps.
    • [Chirp the horn (if selected ON in personalization).]

An additional press of the UNLOCK button will unlock the fuel door also.

Lock All Doors

Press the LOCK button in order to perform the following functions:

    • Lock all of the doors, including the fuel door.
    • [Immediately turn off the interior lamps].
    • Flash the park lamps.
    • [Chirp the horn (if selected ON in personalization).]
    • [Arm the content theft deterrent (CTD) system].

Rear Compartment Lid Release

If the vehicle transaxle is in PARK or NEUTRAL and the ignition is in the OFF position, a single press of the rear compartment release button will open the rear compartment lid. The interior lamps will [not] illuminate.

Fuel Door Release

If the vehicle transaxle is in PARK or NEUTRAL and the ignition is in the OFF position, a single press of the fuel door release button will open the fuel door.

Rolling Code

The keyless entry system uses rolling code technology. Rolling code technology prevents anyone from recording the message sent from the transmitter and using the message in order to gain entry to the vehicle. The term "rolling code" refers to the way that the keyless entry system sends and receives the signals. The transmitter sends the signal in a different order each time. The transmitter and the BCM are synchronized to the appropriate order. If a programmed transmitter sends a signal that is not in the order that the BCM expects, then only the [fuel door release] button will function.