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2011 GMC Sierra Performance Monitors

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Latest Customer Reviews

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


Review

Reviewed By Guy S (Sneads Ferry, NC) Reviewed for a 2011 GMC Sierra —11/7/2014 9:02 AM

I have a GMC Sierra, 2011 5.3L vehicle... This item roughly increased my MPG from 17 to 19.5 for both highway and city use. Now I was really concervative with my driving, if your punching the gas pedal your not going to get close to that. The system did change the shifting of my vehicle, I notice an improvement of shifting and responsiveness, the only problem I had with this was a faulty cable upon purchase. I called and a replacement was sent to me automatically free of charge! Good service!

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DiabloSport Trinity T-1000 Programmer Reviews


The best programmer

Reviewed By abe j (Atwater, CA) Reviewed for a 2011 GMC Sierra —3/27/2012 12:03 PM

I own a motorcycle Dyno, so I understand how and what is needed to get your vehicle correctly tunned. This programmer is the only one made that lets u do any thing to your motor and trans! Well worth the money!! The other brands are not worth the plastic they are made of.

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DiabloSport inTune i2 Tuner Reviews


i2 tuner

Reviewed By John J (LOCKPORT, IL) Reviewed for a 2012 GMC Sierra —12/5/2016 12:21 PM

This was my first time using a tuner and it was very easy to use and certainly made a difference in performance.

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