GM Service Manual Online
For 1990-2009 cars only

The Keyless Access System transmitter functions will work up to 100 feet (30 m) away.

There are other conditions which can affect the performance of the transmitter. See Keyless Access System .


Object Number: 1657531  Size: A3

Your vehicle comes with two transmitters.

[block ] (Lock): Press to lock the doors. The indicator light on the door will flash once. If [block ] is pressed twice, the doors will lock, the light will flash once and the horn will sound once.

(Unlock): Press once to unlock the driver's door. The indicator light on the door will flash twice. Press twice within five seconds to unlock both doors. If it is dark enough outside, your interior lamps will come on. Your memory settings may also be recalled when you press on the keyless access transmitter. See Memory Seat, Mirrors and Steering Wheel for more information.

(Trunk): Press and hold for about one second to open the trunk while the engine is turned off or the shift lever is in PARK (P).

Press to sound the vehicle alarm. Press any other button on the keyless access transmitter to stop the vehicle alarm.

Matching Transmitter(s) to Your Vehicle

Each keyless access transmitter is coded to prevent another transmitter from working with your vehicle. If a transmitter is lost or stolen, a replacement can be purchased through your dealer/retailer. All transmitters need to be re-coded to match the new transmitter. The lost transmitter will no longer work after the new transmitters are re-coded. Each vehicle can have a maximum of four transmitters matched to it.

To match a new transmitter to your vehicle when you have a recognized transmitter: Two recognized transmitters are required for Canadian owners.

  1. The vehicle must be off.
  2. Have the recognized and new, unrecognized transmitters on your person.
  3. Go to the rear of the vehicle and insert the vehicle key into the key cylinder located on the lower rear fascia on the driver's side of the vehicle. See Trunk for more information on the key cylinder.
  4. Open the trunk.
  5. Turn the key five times within five seconds.
  6. The Driver Information Center (DIC) will display READY FOR FOB #X. X can be 2, 3 or 4.

  7. Object Number: 1657542  Size: B3
  8. Place the new, unrecognized transmitter in the glove box transmitter pocket with the buttons facing to the right.
  9. Once the transmitter is programmed, a beep will sound. The DIC will display READY FOR #X, where X can be 3 or 4, or MAX # FOBS LEARNED.
  10. Press the Acc. button.

The Canadian immobilizer standard requires Canadian owners to see their dealer/retailer for matching new transmitters when two recognized transmitters are not available. United States owners are permitted to match a new transmitter to their vehicle when a recognized transmitter is not available. The procedure will require three ten minute cycles to complete the matching process. Do the following:

  1. The vehicle must be off.

  2. Object Number: 1657542  Size: B3
  3. Place the new, unrecognized transmitter in the glove box transmitter pocket with the buttons facing to the right.
  4. Go to the rear of the vehicle and insert the vehicle key into the key cylinder located on the lower rear fascia on the driver's side of the vehicle. See Trunk for more information on the key cylinder.
  5. Open the trunk.
  6. Turn the key five times within five seconds.
  7. The DIC message will display OFF-ACC TO LEARN.
  8. Press the Acc. button.
  9. The DIC will read WAIT 10 MINUTES and will count down to zero, one minute at a time.
  10. The DIC will display OFF-ACC TO LEARN again.
  11. Press the Acc. button.
  12. The DIC will read WAIT 10 MINUTES and will count down to zero, one minute at a time.
  13. The DIC will display OFF-ACC TO LEARN again.
  14. Press the Acc. button.
  15. The DIC will read WAIT 10 MINUTES and will count down to zero, one minute at a time.
  16. A beep will sound and the DIC will read READY FOR FOB #1. At this time, all previously known transmitters have been erased.
  17. Once the transmitter is recognized and programmed, a beep will sound and the DIC will display READY FOR FOB #2.

If you have additional transmitters to program, take transmitter 1 out of the transmitter pocket and place transmitter 2 in the pocket. This can be done repeatedly until up to four transmitters have been programmed. The DIC will then display MAX # FOBS LEARNED and will exit the programming mode.

When you are done programming transmitters, press the Acc. button.

Battery Replacement

A weak battery may also cause the DIC to display NO FOB DETECTED when you try to start the vehicle. If this happens, place the transmitter in the glove box transmitter pocket with the buttons facing to the right. Then, with the vehicle in PARK (P) or NEUTRAL (N), press the brake pedal and the START button. Although this will start the vehicle, it is recommended that you replace the transmitter battery as soon as possible. The DIC may display FOB BATTERY LOW.

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: 1696401  Size: B3
  1. Separate the halves of the transmitter with a flat, thin object inserted into the slot on the side of the transmitter.
  2. Remove the old battery. Do not use a metal object.
  3. Insert the new battery, positive side facing down. Replace with a CR2032 or equivalent battery.
  4. Put the transmitter back together tightly.