Not sure which 1999 Chevy Silverado 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:
"Installed in my G6 in 10 minutes, really easy just took my time to insure everything was correct. Improved shifting and throttle response. Looks like it improved MPG by close to 2 MPG in city driving. Bought Stage 2 in prep for other changes to come." —Stephen P from Albuquerque, NM bought a Jet Performance Module for a 1999 Chevy Silverado, 3.5L V6.