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.
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.
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