Not sure which 2004 Hummer H2 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:
"Very Easy to install, and so far to upgrade has been great. I would totally recommend this chip to other Hummer H2 and 6.0L engines." —Wade L from Tiki Island, TX bought a Jet Performance Module for a 2004 Hummer H2.