One thing I've learned about owning various GM vehicles for almost 20 years as that they often have difficulty getting new things (for them) right the first time. The 3.0 Duramax is new, whereas the 6.2 is older. There has been time to find many problems in the 6.2 and get those issues resolved. Furthermore, every gas station in the country has gasoline. Not all of them have diesel. When you need to fuel up, you need to fuel up. I didn't want to run into a situation where I couldn't reach a gas station that had diesel because it wasn't available at the exit I got off the highway at, and I then had to get back on and continue my trip to the next gas station. If you're going up hill towing, the odds of making it up decrease significantly. Another area of concern is that diesel engines are heavier than gasoline engines. This not only reduces the weight you can tow, but also places more bias on the front end. I have family in Northern Utah, and driving there in the winter is likely. I need the weight between the front and rear axles as close to 50/50 as possible when unloaded to have the best possible traction for climbing hills. Growing up in Northern Utah, I've seen many times where an unloaded 4x4 truck couldn't make it up a snowy hill. I was initially leaning towards buying a Sierra AT4 with the 3.0. Once i decided to get the 6.2 V8 I could no longer justify the $6,000 price difference between the Sierra AT4 and the Silverado Trail Boss, so I went with a Trail Boss LT. Getting the gasser also allowed me to have some features GM doesn't offer with the diesel, such as cool air intake and catback exhaust. Sent from my SM-N960U using Tapatalk