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Boise City Performance Chips

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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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Range Active Fuel Management Disable Device Reviews


GM's AFM disabler.

Reviewed By Todd P (New Franken, WI) Reviewed for a 2007 Chevy Tahoe —12/22/2014 12:48 PM

This product does what it states, leaves truck in 8 mode. Plug and go simple connection. I installed a on off switch for it so when the truck sits for a few days the battery will not drain.

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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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