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1999 GMC Sierra Performance Chips & Programmers

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Latest Customer Reviews

Hypertech Max Energy Programmer Reviews


hypertech max energy programer

Reviewed By james b (CHAPMANSBORO, TN) Reviewed for a 1999 GMC Sierra —3/12/2016 12:49 PM

dose every thing it said it would . I can really tell a difference in performance!

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Superchips Flashpaq F5 Tuner Reviews


Superchips tuner

Reviewed By Danny G (farmington, IL) Reviewed for a 2013 GMC Sierra —3/22/2017 3:31 PM

This is my second superchips tuner I have purchased, one for a 2009 Sierra and this one for my 2013 Sierra. Combine this tuner with a good cat back exhaust and cold air intake setup and you can tune your truck to run the way you want. Very happy with the ease of use when connected and making changes. No going to the dealer when installing larger tires to get the speedometer reset.

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Bully Dog GT Platinum Tuner (50-State Legal) Reviews


Works better than expected

Reviewed By Lee M (Bella Vista, CA) Reviewed for a 2010 GMC Sierra —3/13/2017 10:31 PM

Adds good power tons of torque and helps gas mileage a noticable amount. Definitely would recommend

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