I just bought an additional keyless entry remote for my truck (you know, the factory door unlocker thingy mabob). Anyway... how dod I program the damn thing?

Please help!

Steve

Programming requires probing the Data Link Connector. That can be tricky and isn't recommended for the average DIY. Serious damage can result from probing the incorrect terminals. I would recommend a factory dealer or qualified aftermarket shop that advertises this type of work.
Good luck!