stevensc
Well-known member
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?