Key FOB programming is definately not a dealer only job, as much as they'd like
you to think it is!:disappoin Try this procedure. It's a pretty standard
procedure across the GM line: (write-up compliments of nat3ten from trailblazer
forum)
"1 SIT IN VEHICLE AND CLOSE DOOR
2 HOLD FINGER DOWN ON
UNLOCK POWER
DOOR LOCK SWITCH ON DRIVERS DOOR.
3 put key in
ignition, TURN IGNITION ON / OFF , ON / OFF.LEAVE KEY IN IGNITION.(DO NOT START
VEHICLE, ON POSITION IS THE POSITION BEFORE START)
4 RELEASE FINGER FROM
POWER DOOR LOCK.POWER
DOOR LOCKS WILL CYCLE.(JUMP UP AND DOWN)
5 PRESS
AND HOLD BOTH THE LOCK AND UNLOCK BUTTONS ON NEW REMOTE UNTILL YOU HEAR POWER
DOOR LOCKS CYCLE.(JUMP UP AND DOWN) YOU MAY HAVE TO HOLD BOTH BUTTONS DOWN FOR
5- 20 SECONDS.
6 TAKE 2ND NEW , OR OLD REMOTE AND HOLD BOTH UNLOCK AND
LOCK BUTTONS DOWN UNTILL LOCKS CYCLE.(MAY TAKE 5- 20 SECONDS)
7 TURN
KEY ON, THEN OFF.
YOU ARE DONE, EXIT VEHICLE AND TRY YOUR REMOTE."
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