I have tried everything including this
Remove the ignition key from the ignition lock cylinder.
Remove the BCM PRGRM fuse from the fuse panel. Refer to Fuse Block in Wiring Systems.
Close all of the doors.
Close the liftgate.
Turn the ignition lock cylinder to ACC.
Turn the ignition lock cylinder to OFF, and then back to ACC within 1 second.
Open and close any vehicle door. A chime will be heard when the system enters the BCM programming/diagnostic mode.
Important
After 7 seconds, a chime may be heard confirming successful synchronization. It is necessary to wait approximately
14 seconds for a second chime that will confirm successful programming.

Press and hold the transmitter LOCK and UNLOCK buttons simultaneously for 14 seconds.
Repeat the previous step on each additional transmitter to be programmed.
Remove the ignition key from the ignition lock cylinder.
Install the BCM PRGRM fuse back into the fuse panel.



it does not work any help would be great
Thanks

 

2005 Montana SV6 I have tried everything including this
Remove the ignition key from the ignition lock cylinder.
Remove the BCM PRGRM fuse from the fuse panel. Refer to Fuse Block in Wiring Systems.
Close all of the doors.
Close the liftgate.
Turn the ignition lock cylinder to ACC.
Turn the ignition lock cylinder to OFF, and then back to ACC within 1 second.
Open and close any vehicle door. A chime will be heard when the system enters the BCM programming/diagnostic mode.
Important
After 7 seconds, a chime may be heard confirming successful synchronization. It is necessary to wait approximately
14 seconds for a second chime that will confirm successful programming.

Press and hold the transmitter LOCK and UNLOCK buttons simultaneously for 14 seconds.
Repeat the previous step on each additional transmitter to be programmed.
Remove the ignition key from the ignition lock cylinder.
Install the BCM PRGRM fuse back into the fuse panel.



it does not work any help would be great
Thanks [/quote]

 

I have a 2009 montana Sv6 and to program a new key or fob I had to take it to a GM dealer to have them program it on a computer system.