Not sure which 2002 GMC Sierra Power Programmers & Performance Tuners are right for you? We have over 5642 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:
"I've long been skeptical of the tunes you might get from the simple programmers but relented to try it out on my GMC 6.0 gas it worked flawlessly, easy to use, simple and straight forward. I had the info in and its never run as smooth and started as fast, a 1 second crank and its running no hesitation, most of all the tires now match the speedo. I'm a believer.
Bob J." —Bob J from Springville, UT bought a Hypertech Max Energy Programmer for a 2002 GMC Sierra, 6.0L V8.
"Overall a nice upgrade. Noticably firmer shifts and better performance. Very small improvment in mpg!" —Robert W from Northlake, IL bought an Edge CS Evolution Programmer for a 2002 GMC Sierra, 6.0L V8.
"Not a huge power gain, but there is a noticable torque difference. 1.5 MPG increase." —Richard H from Smithfield, NC bought a Hypertech Max Energy Programmer for a 2002 GMC Sierra.
" My truck has the 4.8L engine so after I put 33" tires on it I thought the only way to get my power back was to change the gearing. I was wrong! I`ve only used the 87 octane tune and my truck already feels crisper than it did before I put on the 33's. The ability to correct and firm up my shifts in addition to the extra power is well worth the money. If you are even considering buying one just do it. You will not regret it!" —Jason P from Whiteville, TN bought a DiabloSport inTune I-1000 Tuner for a 2002 GMC Sierra.
"I love the tuner, I'm very glad I got it. The only thing I don't like is how it's over $300 for just a one time use part.. I guess that's just life though. Would definitely recommend to anybody who's looking to get some extra horsepower without tearing apart your motor" —Luke S from Wayland, MI bought a Superchips Flashpaq Tuner for a 2002 GMC Sierra, 5.3L V8.