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2008 GMC Sierra Performance Chips & Programmers

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Latest Customer Reviews

Range Active Fuel Management Disable Device Reviews


Good-bye AFM (Active Fuel Management)

Reviewed By James K (Colorado Springs, CO) Reviewed for a 2008 GMC Sierra —10/29/2014 6:40 PM

I bought this disable the AFM in my '08 GMC Sierra 1500 SLT 63000 miles. Instantly stopped AFM, fuel mileage went from 13.8 to 14.7 on first tank of gas. So far, works perfectly! The blue LED's on it were a distraction the first two days, but now I'm used to them (they show the status). As far as I'm concerned, you can not go wrong with this product! Shipping was blazing fast (overnight).

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Hypertech Max Energy Programmer Reviews


Hyper Fast.

Reviewed By Jeffrey F (Schenectady, NY) Reviewed for a 2008 GMC Sierra —8/28/2014 12:54 PM

Fast shipping. Excellent value. Only issue I had was having to update the programmer new out of the box? Otherwise easy install. Using the econ setting so I don't necessarily feel a performance gain but hoping for better fuel mileage. Only programmer I use is Hypertech.

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Bully Dog Triple Dog GT Tuner (49-State Legal) Reviews


great product

Reviewed By zachary z (TRAVERSE CITY, MI) Reviewed for a 2008 GMC Sierra —8/19/2014 3:57 AM

Can really tell a difference. Only down side is that the screen is a lot smaller than what I thought so it's somewhat hard to read going down the road.

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