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Keyless entry programming
Did a search on this board for keyless entry programming on my 2003 Trailblazer, and I seem to have found the procedure. I still have a couple of questions:
1. What order do I program the four transmitters? 1, 1, 2, 2? or 1, 2, 1, 2? Does it matter? I'd like the Driver 1 and Driver 2 seat and mirror positions to work properly with both #1 and both #2 remotes.
2. Will a Snap-On MT/MTG 2500 scan tool program the remotes? Do I need a 2003-capable cartridge to program a 2003 Trailblazer? (I currently have cartridges only to 2001)
The procedures I found:
Method 1 - No Tools Required
Close all the vehicle doors.
Insert the ignition key into the ignition lock cylinder.
Press and hold the door unlock switch.
While holding the door lock switch in the unlock position, cycle the ignition ON, OFF, ON, OFF.
Release the door unlock switch. The doors will lock and unlock to confirm the program mode.
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.
Repeat the previous step to program up to four transmitters.
Turn the ignition switch to the RUN position in order to exit the keyless entry transmitter mode.
Operate the transmitter functions in order to verify correct system operation.
Method 2 - Scan Tool Required
Install a scan tool.
Turn the ignition ON, with the engine OFF.
Use the scan tool in order to access the Lift Gate Module (LGM) Special Function: Program Key Fobs menu.
Follow the directions on the scan tool in order to program the transmitters.
Operate the transmitter functions in order to verify correct system operation
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Last edited by Schurkey; 08-16-2005 at 08:46 PM.
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