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GMC Sierra DiabloSport Performance Chips

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Latest Customer Reviews

DiabloSport inTune I-1000 Tuner Reviews

Spend the extra on a custom tune

Reviewed By Phillip S (coweta, OK) Reviewed for a 2014 GMC Sierra —10/16/2014 8:08 PM

Minimal performance gain, biggest problem with the 6.2L is the terrible soft shifts. This tunernhas an"hard" shift option, but its just barely any better.

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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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DiabloSport Trinity T-1000 Programmer Reviews

great buy

Reviewed By Eric H (Shorewood, IL) Reviewed for a 2000 GMC Sierra —9/6/2014 1:42 PM

bumped my the gas millage from 10-14 on my 6.0L 2500 gmc. Good throttle response and shifts much smoother when casual driving. Aggressive shifts when you're on it. 0-60 went down 2 seconds.

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