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2003 GMC Sierra Power Programmers & Performance Tuners

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Latest Customer Reviews

DiabloSport Trinity T-1000 Programmer Reviews

The Devil made me do it, enhance my truck's performance, that is

Reviewed By james S (RIVERVIEW, FL) Reviewed for a 2003 GMC Sierra —9/10/2015 1:49 PM

This is my first foray into Tuning, but with this product, and a little research its point and click. Installation/use was easy, and tunes can be modded as you go. Easy to read, easy to navigate, easy to use (to a certain point, for a novice). And fun. You notice the differences in performance right away.

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Hypertech Max Energy Programmer Reviews

Hypertech programmer is a quality product.

Reviewed By Gary R (CASPER, WY) Reviewed for a 2003 GMC Sierra —3/29/2015 4:58 PM

Easy to set up. Easy to program vehicle. Better acceleration; better power; some increase in MPG. Almost like having a new truck.

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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

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