keyless -resync

My keyless entry quit working (2003 Sierra) and the manual mention "replacing" the battery and "resynchronizing" would be discussed on a another page...I go there and there is only mention of battery replacement but nothing on "resyncronizing"

Just do the battery.Resync is for new remotes.

If your remote is not responding after quickly changing the battery, to resync the remote, simply hold down LOCK & UNLOCK on the remote while standing near the vehicle for 7-10 seconds.

If your remote is not responding after quickly changing the battery, to resync the remote, simply hold down LOCK & UNLOCK on the remote while standing near the vehicle for 7-10 seconds.
Great advise and this website is logged into my favorites!

New battery..didn't work...tried the two button trick...worked a few times...now not again. HELP?

If you have the battery out of the remote too long the resync procedure won't work, and you will have to re-program the remote.

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 four 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.

tried the steps...got a few unlock/lock and now nothing again. Any more ideas?

Could be a bad transmitter,do both your keyless transmitters do the same thing?

I only have one...bought truck used....about how much do new ones cost?

Visit the web address link above this post: Your in luck, Mine was only about $35.00 from Arizona.

My dad finds them in the junk yard, gmc cars use a different since they have a trunk button, so truck only. I only got one with my truck, I'm going to get another from him and use this page to reprogram
Great site as usual!!

Sorry to bring an old topic back, but is there any method of reprogramming the remote so that it gives both the remote and receiver a new code? My set of keys got stolen, along with the key fob, but I have a spare, so Id like to give the spare a new code, so the original cannot be used again (and for that matter, how difficult is it going to be to change the tumblers so that I can have a new key made?)