2003 GMC Sierra remote programming

I lost 1 of my remotes and got one off eBay and need to program it in. I know I have to do both remotes. Will the posts I saw on other Chevy, GMC trucks 99 up work or do I need to do my 2003 different? And if I have to do the 4 and 8 pins is the diagram listed earlier correct for my 2003? A new posting with all the info would be great. Thanks in advance Eugene