Reviewed By Kolton B (LEVELLAND, TX) Reviewed for a 2009 GMC Sierra —7/19/2016 11:58 PM
Got here extremely fast, works excellent.
Reviewed By Clayton U (HUNTSVILLE, AL) Reviewed for a 2009 GMC Sierra —5/18/2016 6:29 AM
Works as listed. Easy to plug into service port. Engine seems to run smoother especially when shifting at slow speeds. Have not noticed any appreciable difference in MPG. Also have not noticed any battery drain by leaving it plugged in.
Reviewed By Sesar C (East Wenatchee, WA) Reviewed for a 2009 GMC Sierra —3/7/2015 12:54 AM
The reaso I bought this unit to get rid of the AFM in my truck I install a 3" exhaust no difference runs even worse after I install the tunner wow what a difference no more AFM now my truck sounds great runs even better lots of power my transmission shift really nice highly recommend.