The difference for me towing without to with EFI live was only 1mpg more, but the power was most appreciated. I think Nick's over 8000lbs tune is only 40 or 60hp but it makes a difference. I also think that the mileage was not as high because the tuning is set up to hold the shift points longer thus keeping the RPM's up keeping you in the power band for towing. Which is really the point of the tow tune. It is not a tow/mileage tune LOL too bad.If you really want or need one I agree with going EfI live,the cost of the aftermarket brake costs as much EFI live and you get many more advantages too.Like DPF and ERG delete and that = several MPG gains.Not to mention horse power.
mine works great,I use the gear selector switch to drop it down a few gears and it holds really well but its not as aggressive as an exhaust brakeThanks for the help so far guys...Phil you think I would be ok with just going the tuner route then? What other advantages are there to a tuner versus just a straight exhaust brake?
It is the turbo break LOL wired into the factory ECM. I do not know if this had to be programed in or the programing was there already and is just needed a switch for on and off. All there is on mine is a toggle switch on and off and two wires into the factory harness, I do not know what pins. I did not do this it was done by friends in high places LOL GM places. Sorry there is no link other than maybe a post I started when I had it put in.Could you elaborate please? What Turbo Brake are you referring to? What is involved? Do you have a link to it?
I think the tuner route with the tow tunes as someone mentioned would server you well. I too pull a 13K + 5th wheel and didn't need the extra power but boy that tow tune for over 8K lbs is nice. The turbo break as some one said is not as aggressive but it does make a difference. There was someone on here with a video going down hill with either a pac break or a banks speed break I can not remember. I wanted the speed break for mine but the dealerships said it would void warranty so I had the turbo break put in as a Guinea pig and it worked. I then said piss on the warranty and went with EFI live from Nick at duramaxtuner and the DSP5 with a stock, two tow tunes one for over 8K and one for under 8K a daily driver at 100hp I think and a hotter tune at 125 or 135hp...I rarely use that one. I am so glad I got rid of the DPF even though I may have problems if warranty issues arise. I gained MPG both towing and unloaded and also the fun factor 135hp if I want it.Thanks for the help so far guys...Phil you think I would be ok with just going the tuner route then? What other advantages are there to a tuner versus just a straight exhaust brake?