GM Service Manual Online
For 1990-2009 cars only

Object Number: 1272912  Size: B2

The following functions are available if your vehicle has the remote keyless entry system:

(Unlock): Press this button to unlock all of the doors. If all of the doors and the trunk or liftgate are closed, the hazard lamps will flash twice to indicate that unlocking has occurred. The theft-deterrent system will deactivate and the security indicator will turn off. The security indicator is located on the base of the driver's door lock. If a door is not opened or if the engine is not started within 30 seconds after pressing unlock on the remote keyless entry transmitter, all of the doors will automatically relock and the theft-deterrent system will reactivate.

[block ] (Lock): Press this button to lock all of the doors. If all of the doors and the trunk or liftgate are closed, the hazard lamps will flash once and the horn will chirp to indicate that locking has occurred. The theft-deterrent system will activate and the security indicator will flash. If the driver's door is open while pressing lock, all of the doors, except for the driver's door will lock. If any door other than the driver's door is open while pressing lock, all of the doors, including the driver's door, will lock.

(Trunk): Press this button to unlock the trunk or liftgate. If all of the doors are locked while pressing the trunk button, the trunk or liftgate will not unlock. The doors must be unlocked for the trunk button to unlock the trunk or liftgate.

The LED (A) on the transmitter will flash when the buttons on the transmitter are pressed.

The lock, unlock and trunk buttons will not operate and the theft-deterrent system will not activate while the key is in the ignition.

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 five transmitters matched to it.

Battery Replacement

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

You can tell the battery is weak if the LED fails to illuminate or if the transmitter will not work at the normal range in any location. If you have to get close to your vehicle before the transmitter works, it is 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: 1272915  Size: B3

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

  1. Remove the screw from the back of the cover and open the cover of the transmitter.
  2. Pull the transmitter unit out of the cover and open the cover of the transmitter unit.
  3. Remove the battery and replace it with the new one. Make sure the positive side of the battery faces up. Use one three-volt, CR1616, or equivalent, type battery.
  4. Close the cover of the transmitter unit and put the unit in the cover of the transmitter.
  5. Assemble the transmitter cover and replace the screw. Make sure the cover is on tightly, so water will not get in.
  6. Test the transmitter operation.