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2003 GMC Sierra Performance Chips & Programmers

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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 Insight CS/CTS Monitors Reviews

Awesome product

Reviewed By Steven G (COCOA, FL) Reviewed for a 2003 GMC Sierra —10/14/2014 3:55 AM

Although smaller than I expected (the pictures make it look way bigger than it actually is) I really like this monitor. It is totally customizable. From the number of gauges to the background. Everything can be changed to the way you want it.

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