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2004 GMC Sierra Power Programmers & Performance Tuners

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Latest Customer Reviews

DiabloSport inTune i2 Tuner Reviews


2004 gmc sierra 1500 slt 4x4

Reviewed By edgar l (Clifton, CO) Reviewed for a 2004 GMC Sierra —4/11/2016 6:54 PM

Decent tuner, i like that you can adjust parameters such as spark, fuel, shift pressure etc.

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


totally worth it (gmc 2500 6.0)

Reviewed By Dex B (ALBION, IN) Reviewed for a 2004 GMC Sierra —7/12/2015 4:25 AM

I got the bully dog to try and increase my fuel mileage and give me a little more giddy up when I'm hooked to the trailer. Before the triple dog I was averaging 11 to 11.5 Mpg, maybe 8 with a trailer loaded down. Now I'm averaging 14 to 15 and 12ish with my trailer. Very good investment I'm glad I got that little bugger.

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Hypertech Max Energy Programmer Reviews


Tuner for speedo correction

Reviewed By Roger G (SAINT SIMONS ISLAND, GA) Reviewed for a 2004 GMC Sierra —7/2/2015 4:55 AM

I was very pleased with the ease of use of this tuner. I bought for my speedo correction after a rear end gear change and a tire change. When I programmed everything the speedo was dead nuts on to my GPS. 5 miles later my ABS and brake warning lights come on. Called hypertech... said it was a known fault of the abs gm computer and I would have to continue to input tire size until I got within 10% of the front to rear wheel speed. I dropped it 1/2" and speedo is off by 1.5 mph @60mph. Recommend

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