2015 Z-218TD weight info
Throwing some weight info for others since there has been very little info on the web for any true readings. This is off of an agricultural scale nearby. I spent some time with it loaded on the front with 2 sport atv's, roughly 800 lbs combined. This includes 2 batteries and 2 propane tanks.
760lbs - Tongue weight
1280lbs- Tongue weight with 2 atv's with combined weight close to 800lbs
5380lbs- Dry empty total weight, no atv's
Brochure states 604lbs for the hitch weight, keep in mind this does not include propane tanks or batteries. Add however much water you want at 8.345lbs per gallon.
5797lbs- Empty deck, 50gals of water just doing the math.
Now hitch ratings on the 2006 2500HD that I use for work states it is capable of 1000lbs tongue weight with no system and 1500lbs tongue weight using WD set up. This was another item I seen on the internet with people guesstimating. Don't do that folks, its not rocket science to just read what is on the trucks. I am sure this info will help others as they search this new crossbreed of toyhaulers. These are 1/2 ton towable (with an empty deck mind you) providing you have right final drive gearing if you go into the hills and have transmission and oil cooler. Here is some gearing ratio's. Look in the glovebox on your RPO codes and you will know what your vehicle has. 4.10 would be ideal. My 1500 has the 3.42 so it will be used basically just to bring trailer home from storage to prep for camping, then using the in-laws 2500 for the journey. Would be great to have others who have different loads on the decks to post in here as well so we can gather more info.
Rear Axle: 3.73 Ratio
Rear Axle: 4.10 Ratio
Rear Axle: 3.08 Ratio
Rear Axle: 3.42 Ratio
Rear Axle: Positraction
Rear Axle: 4.56 Ratio
Rear Axle: 5.13 Ratio