Your Cart Is Empty

2003 GMC Sierra Power Programmers & Performance Tuners

Have a Question?
Have a Question? Ask a product expert! (800) 874-8888 Live Chat

  • shipping icon
  • Not Rated Yet

 

View all reviews for this product

There are no customer reviews for this product

You may only compare up to 5 products at a time.
Please select at least two products to start comparing.

Latest Customer Reviews

Edge CTS Evolution Programmer Reviews


03 gmc sierra 2500hd diesel-6.6liter

Reviewed By matt f (SINKING SPRING, PA) Reviewed for a 2003 GMC Sierra —6/28/2013 10:04 AM

I'm from sinking spring pa, I ordered the cts on Thursday and received it Friday afternoon. Definitely great shipping. Installation was very easy, had a slight problem getting it to program my truck but called tech support and they instructed me very clearly what to do, followed their instructions and plugged unit back into my truck, followed the prompts and within minutes I was on the road. I currently keep it on the third power level, 18mpg round town, and pushing 24mpg highway

View More Reviews

Superchips Cortex Programmer Reviews


power program

Reviewed By Pat S (Santa Cruz, CA) Reviewed for a 2003 GMC Sierra —7/18/2012 12:03 PM

Programmer was easy to install takes about 3-4 min power you can feel when on freeway but dont feel in low end tourque. shift point much firmer. still waiting to see my gas milage go up other reviews say gas milage went up with performance tune to 16-17 mpg but still reads 15.1 AVERAGE mpg maybe 87 tune will do the trick.

View More Reviews

DiabloSport inTune I-1000 Tuner Reviews


Great Purchase

Reviewed By Denny S (Denair, CA) Reviewed for a 2003 GMC Sierra —6/25/2012 5:54 PM

The DIABLOSPORT INTUNE is a great purchase. I do see a difference in my truck and do recommend it too others. I would like to have more variety of tunes though. Other than that, it gives no problems and does great.

View More Reviews