Not sure which 1999 Chevy Silverado Performance Chips & Programmers are right for you? We have over 7429 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:
"Added 2.5 mpg to my silverado on the interstate. Having really seen a diffence in the performance setting but I'm still playing with it. Overall im very satisfied will certainly be getting one for my wife's truck." —Chase E from Concord, NC bought a Superchips Flashpaq Tuner for a 1999 Chevy Silverado, 5.3L V8.