Matching Key Less Transmitter To My Vehicle

2003 Chevy Siverado, C-1500, bought new transmitters for my key ring (due to not getting any when I bought the truck used). How do I match the transmitters to my truck. Can I do this at home??

What does the owner’s manual say about this?

didn’t get the owners manual when I got the truck

The instructions are here:
http://www.wikihow.com/Program-a-Keyless-Entry-for-a-Chevy-Silverado
hope this helps.

Thank You!