2001 silverado keyless entry

Just purchased a 2001 silverado and ordered some remotes off ebay and need to program them. The way they tell me wont work. The way i enter my program mode is to pull back on the turn signal and turn the key on off on off. That part works fine but when I hold the lock and unlock button of the remotes nothing happens.

Do a search, there have been multiple threads about how to program and the problems others have run into.

Here is one ofthe threads I saved and worked for mine. http://www.automotiveforums.com/vbulletin/showthread.php?t=112559&highlight=programming+fob