[DmaxDually]

I am not going to give my opinion on what truck you should buy. What I am going to give is information so you can make your own decision. I'm going to post the factory weight ratings of my truck and camper plus the actual weights from Cat scale reading that I did over the past month.

My Truck is a 2012 Chevy Silverado Crew Cab long bed diesel dually. It has the DuraMax 6.6 with the Alison 6 speed Transmission and 3.73 rear end gears. I replaced my factory fuel tank with a 61 gal Transfer flow tank and also added a 50 gal aux tank to the bed. I also have a in bed tool box with assorted tools and gear.

The factory weight ratings from the door sticker are as follows:

GVWR: 13,000 lbs
GAWR Frt: 5,600 lbs
GAWR Rear: 9,375 lbs

Here are the Cat scale weights of just my truck with no trailer. The main fuel tank was full (61gals), aux tank empty + driver:

Steer Axles: 5,400 lbs
Drive Axles: 4,420 lbs
Gross Weight: 9,820 lbs


My camper is a 2012 Montana 3750FL and the factory weights from the build sheet are:

GVWR: 15,740 lbs
UVW: 12,522 lbs
CCC: 2,340
CCC w/water: 1,792 lbs
Hitch: 2240
Dry Axle Weight: 10282
GAWR: 7,000 lbs x2
Exterior length: 39'1"

The following are my actual Truck and camper weights from a Cat Scale reading last week.
My truck main fuel tank was full (61gals). Aux tank empty + Driver.
Camper water tank was near empty. All grey and black tanks were empty. Reading were:

Steer Axle: 5,420 lbs
Drive axle: 6,920 lbs
Trailer Axles: 12,300 lbs
Gross weight: 24,640 lbs

These are the actual weights from my Truck and camper. They will give you a ball park idea of the weights of a 40' camper you will be dealing with.
Look at the factory weight ratings from your door sticker on your truck. Then look at the campers weight ratings you are looking to buy and do the math. Opinions do not matter. The bottom line is either you will be within you trucks weight ratings or you will not be...period. You can be within the weight rating, a little above or a lot above it's up to you. It's about the safety of you, your family and other on the road. The final decision is yours and yours along.
I hope these numbers help you with your decision.