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GMC Range Technology Performance Chips & Programmers

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Latest Customer Reviews

Range Active Fuel Management Disable Device Reviews


Works as Advertised

Reviewed By peter v (Middletown, RI) Reviewed for a 2008 GMC Sierra —6/22/2015 3:24 AM

The AFM Disable is a great device. I've had it installed for roughly 1 month and it does exactly as is claims to, and no more. My base idle seems to be getting smoother and I don't miss the sometimes jerky transitions between 4 and 8 cylinders (especially noticeable if it occurs during a trans downshift. I'm not noticing a real impact in actual fuel mileage. I'd rather have a smoother running, longer lasting engine regardless.

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