Programming for 00 S Blazer
1) With drivers door closed, hold down the power unlock button on the door panel
2) Turn the ignition ON, off, on, off
3)Release the power unlock switch on the door panel
The keyless receiver will respond by locking, then unlocking the doors
4) Hold down LOCK and UNLOCK on each remote one at a time until doors lock then unlock.
5) Turn on the ignition switch to exit programming.