First post. Please excuse if this has been covered before, but I couldn?t find this topic by doing a search.
I have a 2009 Chevy Express 3500 extended van with a (puny) 4.8 liter motor (LY2) and a 4L80E transmission (MT1) - both stock at this time - and I would like to change the shift programs. The van is always heavily loaded (it's a camper van) and runs 9000-9500 pounds. Because it lugs up hills, the cruise control doesn?t keep up, and there is a drop in speed often followed by a downshift to 3rd (OK) and then often to 2nd (very annoying).
When I connect the HP Tuner and download the stock vehicle data, it shows the following transmission maps: 'normal', 'Pattern A', 'Pattern B', 'hot', and 'hot engine'. Other than the obvious hot's, when are these various maps activated? Is it a function of 'cruise' or not, 'tow/haul' or not, etc.? What should I be data logging to figure out what map it is in, i.e., not sure what to put in my VCM Scanner.cfg file. Attached is the stock .hpt file.
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