Not sure which 2003 GMC Yukon XL In-Line Modules are right for you? We have over 945 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Here's what some of our customers have said:
"my 2003 yukon xl 6.0 has good gas milage with a lot more pick up combind with a jet mass air flow sensor and magnaflow exhaust system. anything auto was less than anyone else" —Mike P from Maumee, OH bought a Jet Performance Module for a 2003 GMC Yukon XL.