Not sure which 2002 GMC Sierra 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:
"This programmer really "wakes" my Duramax up! The Extreme setting gives you the performance. Tow mode allowed me to pull my 35' 5th wheel TT at 75 - 80 with out a strain, getting 10+ per gallon. Enconomy mode boosts mileage an easy 5 to the gallon, if you can keep from playing with the wanna bees, cause even the economy mode wakes the engine up! Making this purchase was one of the best automotive moves I've made since I bought the truck in '02." —Richard C from Temple, TX bought an Edge CS Evolution Programmer for a 2002 GMC Sierra, Automatic, 6.6L Duramax.