How do you change the setting on the keyless entry for your 2001 blazer?

To change the setting on the keyless entry for your 2001 Blazer, first, locate the keyless entry transmitter. Insert the ignition key and turn it to the "On" position, but do not start the engine. Press and hold the "Unlock" button on the transmitter while simultaneously pressing the "Lock" button three times within five seconds. This should reprogram the keyless entry settings; test it to ensure it works properly.