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GMC Sierra Range Technology Performance Chips

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Latest Customer Reviews

Range Active Fuel Management Disable Device Reviews


2011 GMC Sierra 1500

Reviewed By Matthew H (GRAND COULEE, WA) Reviewed for a 2011 GMC Sierra —12/19/2014 5:26 AM

Range product works well. It was easy to install. The AFM was causing my truck to "learch" when stopped at slow speeds (engine shifting from 8 to 4 cyclinders). Also had a lot of burnt oil leaving black residue near the tailpipe. The common problems you see with the GMC FLEX Fuel design. This product fixed them all. I did loose 2 mpg 19to17. More instant power overall. Good product to purchase if you decide to keep the truck instead of sell or return for one without the AFM issues.

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Range Active Fuel Management Disable Device Reviews


Range AFM works

Reviewed By Delvin C (UNION, WV) Reviewed for a 2007 GMC Sierra —11/21/2014 9:32 AM

I have only used it for about a week now, but so far it has worked great. The truck no longer drops down to four cylinders which is great. Purchased this item to see if it will improve or stop my oil consumption. I will try to update later with my results. Great product that does what it says it will.

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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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