Should i use tow/haul mode with Edge?

stevensc · Nov 29, 2017

I recently added an Edge programmer on my Duramax. In the beginning I had hard shifts while towing, (In tow/haul mode on Edge) until I remembered to put truck trans in it's tow/haul mode. Worked great for a while then when trailering the TT over Thanksgiving I noticed unusually high RPM's (and higher than normal EGT's). Turned off truck's tow/haul mode and back to smooth sailing. Wondering if there is a set rule about rather or not to use trucks t/h mode with the Edge?

Hammster · Nov 30, 2017

What is the intent of the Edge Programmer? Seems, based on the website, to keep EGT temps low. But, is that really a problem? I just towed a, roughly, 7000 lb trailer all over the US and back using my 2016 GMC Duramax and it performed flawlessly using the truck's tow/haul mode.
What is the Edge programmer getting you that the stock setup can't? Please note that I'm new to the diesel world, so I'm asking out of curiosity.

stevensc · Nov 30, 2017

I put it on for additional pulling power and fuel economy which it has helped with quite a bit. Main test was going up the "Saluda Grade" in the NC mountains. A four mile continuous uphill grade (can't remember the % but fairly steep). Before I would drop down to about 45 mph if someone would block me and then would not be able to accelerate above 45. Now, if blocked and down to 45 I can easily accel to whatever speed I want. Also have gone from an average of about 9 mpg to 10 mpg. Not a huge deal but over 10%. I should add that I went to a 4" exhaust at the same time so I am sure that helped out also.

Should i use tow/haul mode with Edge?

stevensc

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Hammster

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stevensc

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