Not sure which 2003 Chevy Trailblazer In-Line Modules are right for you? We have over 1502 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:
"Almost got a stage 1 but after reading reviews I realized I would not be happy with a stage 1 considering I had a K&N cold air induction and a cat back Flowmaster exhaust, I was right. The stage 2 is what I woul have expected from a stage 1 so get a stage 2 if you want not to be dissappointed." —Robert F from Venice, FL bought a Jet Performance Module for a 2003 Chevy Trailblazer, 4.2L 6-cyl..