Colorado Diesel Towing Experience
TNRvCamper,
If the 32-foot trailer has typical dry and tongue weights, it is probably too heavy to COMFORTABLY tow with a Colorado diesel. A good “rule-of-thumb” for “COMFORTABLE” towing is to not tow a trailer over about 2/3rds, or 65%, of your vehicle’s rated towing capacity (= 7,600 or 7,700 pounds for our Colorado diesels). In other words, if a trailer is near or over 5,000 pounds loaded, it can be towed within a Colorado diesel’s towing capacity specification, but the towing will be barely “COMFORTABLE.” Beyond 5,000 pounds, fuel mileage will drop (further), wear-and-tear on your Colorado’s engine and transmission will go up, maintaining cruise tow speed will be a challenge, and hills become real barriers.
I tow a light, 3000-pound-loaded travel trailer with my 2017 Colorado diesel (crew cab, short box), and the trailer tows very well. On the other hand, my highway fuel mileage while towing drops to between 18.3 and 20.5 mpg depending on weather and terrain conditions. My non-towing highway mileage is normally 29-30 mpg. Also, I definitely “feel” the trailer while towing and experience somewhat slower climbs and longer stops even with good, well-adjusted electric trailer brakes. I am convinced, based on my personal towing experience, that increasing the trailer weight another 2,000 pounds to 5,000 pounds total would not be fun, and over that, it would quickly become downright miserable.
My personal opinion after towing a 3,000-pound trailer over 4,000 road miles with a Colorado diesel is that I would not feel comfortable towing a trailer over 4,500 pounds loaded, and I would not want a tongue (hitch) weight over 450 pounds. This is just my own opinion, though. It all depends on what “COMFORTABLE” towing means to you; personally.
My Colorado diesel is a 4x4. I normally tow (about 90% of the time) in 2-wheel-drive mode, but I have been very glad, several times, to have 4x4 available for towing in slippery conditions and/or over dirt/gravel roads. It is a personal judgment call relative to whether or not you need 4x4 for towing. It all depends on when and where you want to go!
One more thought: For downhill towing, the Colorado diesel’s exhaust brake is great!
I hope this information helps.
Arizona (and Southern California) Bill