Key FOB programming is definately not a dealer only job, as much as they'd like you to think it is!

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."
Joel
__________________
2008 Hyundai Santa Fe GLS AWD 2.7L
2008 Honda Odyssey LX chick magnet
Gone but not forgotten

: 2007 Chevy Cobalt LS, 2001 Ford Windstar LX, 2005 Trailblazer LS 4x4, 2002 Isuzu Rodeo LS 4x4 & and many more.