GM Service Manual Online
For 1990-2009 cars only

If equipped, you can lock and unlock your doors or unlock your trunk from about 3 feet (1 m) up to 30 feet (9 m) away using the remote keyless entry transmitter supplied with your vehicle.

The following functions are available with the keyless entry system:


Object Number: 808457  Size: A3
[block ] (Lock):  Press this button to lock all doors. The interior lamps will turn off after all of the doors are closed. If all of the doors are closed, the parking lamps will flash twice and the horn will chirp to indicate locking has occurred.

(Unlock): Press this button once to unlock the driver's door. If the button is pressed again within five seconds, all remaining doors will unlock. The interior lamps will stay on for 10 seconds or until the ignition is turned on. The parking lamps will flash twice to indicate unlocking has occurred.

(Remote Trunk Release): Press and hold this button for approximately one second to open the trunk, if the trunk lockout is not engaged. You can open the trunk with the transmitter when the vehicle speed is less than 2 mph (3 km/h), when the parking brake is engaged, or when the ignition is off. The interior lamps will come on for 10 seconds or until the ignition switch is turned to ON.

(Remote Alarm):  Press this button to make the horn sound and the headlamps and the parking lamps flash for up to two minutes. The interior lamps will come on and remain on while the horn is sounding and the lamps are flashing. Turn off the horn and lamps by pressing the remote alarm button again or by turning the ignition to ON.

Programmable Horn Chirp

When you use the remote keyless entry transmitter to lock the doors or use the delayed locking feature the parking lamps will flash and the horn will chirp.

Disable the programmable horn chirp by pressing and holding either of the door lock switches in the unlock position for 10 seconds with the ignition ON and all of the doors closed. When you hear the horn chirp, programming is complete.

Reactivate the horn chirp feature by repeating the above procedure.

Matching Transmitter(s) to Your Vehicle

Each remote keyless entry transmitter is coded to prevent another transmitter from unlocking your vehicle. If a transmitter is lost or stolen, a replacement can be purchased through your dealer. Remember to bring any remaining transmitters with you when you go to your dealer. When the dealer matches the replacement transmitter to your vehicle, any remaining transmitters must also be matched. Once your dealer has coded the new transmitter, the lost transmitter will not unlock your vehicle. Each vehicle can have a maximum of four transmitters matched to it.

Battery Replacement

Under normal use, the battery in your remote keyless entry transmitter should last about four years.

You can tell the battery is weak if the transmitter won't work at the normal range in any location. If you have to get close to your vehicle before the transmitter works, it's probably time to change the battery.

Notice: When replacing the battery, do not touch any of the circuitry on the transmitter. Static from your body could damage the transmitter.


Object Number: 810846  Size: B3

To replace the battery in the remote keyless entry transmitter do the following:

  1. Use a flat object like a coin to separate the bottom half from the top half of the transmitter.
  2. Remove the battery and replace it with the new one. Make sure the positive side of the battery faces up. Use one three-volt, CR2032, or equivalent, type battery.
  3. Put the two halves back together. Make sure the cover is on tightly, so water won't get in.