Question about 2003 Chevrolet Tahoe

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I replaced the battery in the keyless remote and need to resynchronize keyless remote

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Method 1 - No Tools Required, Program All Transmitters
Important: All transmitters which are to be recognized by the PDM must be programmed in a single programming sequence. When using this program method, all previously programmed transmitters will be erased upon the receipt of the programming signal from the first transmitter.
The order in which the transmitters are programmed will determine its numbering position within the PDM memory. The first transmitter programmed will be transmitter #1, and the second transmitter programmed will be transmitter #2. The number stamped on the transmitter case is for reference only; #2 can be programmed as #1, or vice versa. Additional unnumbered transmitters are also available.


  1. Close all the vehicle doors.
  2. Insert the ignition key into the ignition lock cylinder.
  3. Press and hold the door unlock switch.
  4. While holding the door lock switch in the unlock position, cycle the ignition ON, OFF, ON, OFF.
  5. Release the door unlock switch. The doors will lock and unlock to confirm the program mode.
  6. Press and hold the LOCK button and the UNLOCK button simultaneously on one transmitter. After a delay of approximately 15 seconds, the doors will lock and unlock to confirm the programming of that transmitter.
  7. Repeat the previous step to program up to 4 transmitters.
  8. Turn the ignition switch to the RUN position in order to exit the keyless entry transmitter programming mode.
  9. Operate the transmitter functions in order to verify correct system operation.

Posted on Oct 12, 2010

  • Jonathan S
    Jonathan S Oct 12, 2010

    Make sure to have all of your key fab transmitters with at time of reprogramming.

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I need specific programming key fob instructions for 1995 Lexus ES 300. Changed dead battery already. Can get fob ot work.

Posted on Jun 15, 2011

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bluebirdmate
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SOURCE: I replaced batteries in keyless remotes for 2002

Hello: To resynchronize the keyless entry close all doors, key out of ignition. Hold lock and unlock buttons till the doors (all) lock then unlock. If the transmitter still doesn't work you have other problems. Go to auto zone they can check your transmitter to see if it is working.

Posted on Oct 24, 2011

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• Resynchronization may be necessary due to the security method used by the remote keyless entry system. Resynchronization may be necessary due to the security method used by the remote keyless entry system.
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