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GMC Sierra Power Programmers & Performance Tuners

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Latest Customer Reviews

Range Active Fuel Management Disable Device Reviews


Solved that annoying back and forth shifting

Reviewed By Roger C (Wetumpka, AL) Reviewed for a 2011 GMC Sierra —12/25/2014 8:16 PM

I bought my truck used and knew nothing about the "economy" shift to 4 cylinders. My truck did it like crazy and I thought my transmission was broken. Did some research and found this product. Works as advertised. And I like it.

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Superchips Cortex Programmer Reviews


Sierra 1500 5.3L

Reviewed By Keneth S (Jonesville, LA) Reviewed for a 2013 GMC Sierra —12/23/2014 8:37 PM

Easy to use programs in minutes. I can tell A difference. I just program with the quick tunes

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DiabloSport inTune I-1000 Tuner Reviews


2014 Sierra 5.3

Reviewed By Ronald R (Boise, ID) Reviewed for a 2014 GMC Sierra —12/22/2014 7:25 AM

Truck is a lot more fun to drive now. Throttle is more responsive, holds gears longer under full throttle, and shifts do feel firmer. When getting on the gas after a turn, the truck seems to be in the right gear and accelerates better. Overall I am very happy with it.

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