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Hi there. Welcome to our site!
I can probably help you, but first I need to know the model year, engine size and drive type (ex: 2007 GMC Yukon XL 5.3L Automatic 4WD)
Hi again. I think you might be having problems with the site since you have more than one question opened.
Anyways, I thought I refer you to this couple of videos (part 1 and part 2) where it shows how to install remote start on a truck like yours - just click here to view.