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2004 GMC Sierra Performance Chips & Programmers

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Latest Customer Reviews

DiabloSport Trinity T-1000 Programmer Reviews


Nice tuner.

Reviewed By Cody H (SODDY DAISY, TN) Reviewed for a 2004 GMC Sierra —10/9/2014 8:48 PM

Bought this tuner to go along with my full exhaust and intake. Made a very noticeable difference in power and the way the truck shifts. No mpg improvement that I've noticed, but not why I bought it. Would definitely recommend on GM trucks. Also allowing for custom tune is nice as well.

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


Great Product

Reviewed By Trevor F (COON RAPIDS, MN) Reviewed for a 2004 GMC Sierra —9/26/2013 10:11 PM

Improvement on gas mileage, power and torque. Great buy

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Hypertech HyperPAC Reviews


Towing power

Reviewed By matt e (STANARDSVILLE, VA) Reviewed for a 2004 GMC Sierra —8/26/2013 1:47 AM

The HyperPAC system is a great up grade for any type of driver. Because it gives noticable power gains as well as improved MPG Hands down great product!

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