Welcome Tim, I cannot answer anything about the plow issue. Just be careful with the superchips tuner and plowing. If you plow at the highest setting, you will fill the DPF fast and not reach a point where the regen cycle can clean the filter. I tow using the towing position when going into the mountains. This seems to work well while not generating dp's at a rate that the regen cycle cannot handle

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7.5 3500QC 6.7CTD 68RFE Build date June 2007
Superchips tuner 3808, Boost/EGT Laser Gauge, Airaid cold intake