I took a 101 Off-road course this past weekend at Rausch Creek in central PA through Off-Road Consulting (ORC). In central PA we have a lot of land that was previously used for mining/strip mining operations and one way to repurpose these areas are off road parks. Rausch Creek and Anthracite Outdoor Adventure Area (AOAA) are the two most popular in the area. Anyways, it was an awesome time to get out and really use and practice all the new 4x4 tech. Coming from an all mechanical 1995 dodge Cummins, A lot has changed for me. Overall I was really impressed the truck. GMs traction control seems very "tight" and is quick to limit wheel spin while not limiting power, at least in 4 Low. The downhill assist control is also impressive. I'm not entirely sure what all the "Off-road Mode" does besides modifying throttle sensitivity, but between that and the Duramax diesel torque, powering over obstacles is very smooth with no jerking or bucking. Throughout the day I touched bottom three times with no damage, once on a stump right on the frame rail and another on a rock on the passenger rear shock mount, and touched the passenger side mud flap. It was about 10 degrees out, so the water fording part of the course got skipped due to thick ice on their "puddle" but I'm OK with that as I don't know exactly where the differential and transmission breathers are. Please post if you know! All the mud was also frozen so cleanup was easy the next day haha. Overall I was really happy with the Trail Boss, its pretty capable in factory form. I think future upgrades will be skid plates and rock sliders, and eventually a small lift/level with bilstein shocks and new UCAs to clear slightly larger tires. If anyones in the area, I highly recommend ORC, their instructors are great and they offer all kinds of courses ranging from 101 to 303, recovery, winching, etc. I had to really trim the videos for them to fit on the post unfortunately!