How do you reset factory FOB

I have a 2003 chevy suburban with the factory alarm system. I recently added another FOB but I was un aware at the time that you had to reprogram any other FOB that was used with the vehicle... Well to make a long story short, the originall FOB stopped working... I have attempted to reprogram it but the vehicle seems to have locked it out. How can I reset the system to acceppt the original FOB again:frown:

I am going to answer my own reply:smokin: After fooling around with the FOB, I was able to get the vehicle to recognize it again by holding down all three of the buttons while the vehicle was in program mode...Now I just need the wife to bring home the other FOB and hopefully the vehicle wil recognize them both:naughty: