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Old 06-27-2015, 01:42 AM   #31 (permalink)
travelingfamof4
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Icon8 2005 Duramax Owner: Fifth wheel help please!!!

I own a 2005 long-bed duramax 2500 HD Crew Cab truck. I am at a loss as to what size fifth wheel I can pull. I have worked through all the numbers for my truck:

9200 lbs GVW
22,000 lbs GCVWR
Maximum trailer weight (per manual) 12,000 lbs
Rear axle: 6048 lbs
Front axle 4800 lbs

When I weighed my truck, with all passengers and equipment, it had the following weights

Front axle: 4600
Rear axle 3750
Total: 8350

So, my understanding is that I can only place an additional 850 lbs of load on my truck! How is that possible? I understand braking and all that, but this is ridiculous! Can anyone lend a hand? Am I missing something here?

Thanks!

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Old 06-27-2015, 04:22 AM   #32 (permalink)
terryk
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Nope, that about covers it. As you are finding, the 2500's don't have a lot of capacity and I only get 700 more than you.

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Last edited by terryk; 06-27-2015 at 04:27 AM.
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Old 06-27-2015, 03:50 PM   #33 (permalink)
turnpike
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Your read of the weight number is spot on, so consider the these thoughts........

What bites you is the long bed (weights more), crew cab (weights more) that is still within the 9200 gross weight that 2500HD's work with.

If you look at the rear axle rating (6240) minus the rear axle tare weight (3750) you could have about 2290 additional weight on the rear axle (weight of the trailer pin on the truck).

That will put the truck over its gross rating to about 10640. The so called weight police may call you on that number. But many more stay under the axle ratings and drive accordingly. Make sure your trailer brakes are in top shape and working good to slow the trailer. Also with that weight be prepared to not allow the trailer to sway the truck too much.

See my picture.... I run under the 6240 rear axle rating, but over the gross. It works, but I do drive accordingly and prudently.
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'16 Chev 2500HD LTZ Z71, CC, Duramax, Allsion, 4wd, new Sept 2016, has factory fifth wheel prep so added a Curt hitch.

Traded off-'05 Chev, 2500HD, CC, SB, Duramax, Allison, 4WD, bought new April '05, sold at 179,400 miles, LBZ mouthpeice, Blocker Plate & Unplugged EGR, Air Box cut out, lost the cat, 52 US Gal (196 Litre) Titan Fuel Tank, SuperChips tuner reset to stock and retained, AirLift air bags, BrakeSmart Trailer Brake controller, PaceEdwards cover-replaced 2013, DSP Fifth Hitch, JVC KW-NT1 headunit, kept the"AutoEnginuity" scanner.

'02 GMC, 2500HD, CC, SB, D/A, 4wd, Traded in - wrong color

Last edited by turnpike; 06-27-2015 at 03:54 PM.
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Old 06-27-2015, 10:49 PM   #34 (permalink)
IGO1320
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Quote:
Originally Posted by travelingfamof4 View Post
I own a 2005 long-bed duramax 2500 HD Crew Cab truck. I am at a loss as to what size fifth wheel I can pull. I have worked through all the numbers for my truck:

9200 lbs GVW
22,000 lbs GCVWR
Maximum trailer weight (per manual) 12,000 lbs
Rear axle: 6048 lbs
Front axle 4800 lbs

When I weighed my truck, with all passengers and equipment, it had the following weights

Front axle: 4600
Rear axle 3750
Total: 8350

So, my understanding is that I can only place an additional 850 lbs of load on my truck! How is that possible? I understand braking and all that, but this is ridiculous! Can anyone lend a hand? Am I missing something here?

Thanks!
Read my earlier post. As long as you are not over your axle rating's you are good if the tires are correct also. DOT goes by the bridge formula which would legally allow you to tow even more but I would recommend staying close to the axle rating's and under the tire rating's. Like already posted this is assuming brakes are up to snuff trailer and truck. I tow commercial with the truck In my sig and have to go over the scales so I know what I am talking about.
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Old 06-28-2015, 10:23 AM   #35 (permalink)
terryk
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Good for what? Why not just ignore that too?
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Old 06-28-2015, 01:41 PM   #36 (permalink)
turnpike
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Quote:
Originally Posted by terryk View Post
Good for what? Why not just ignore that too?
The what is understanding how the law on vehicle weight works.

In most cases the gross weight limit of the power unit (our pick-up truck or a highway tractor) does not count for much.

For example, a tandem KW rated for a gross weight of 45,000, may have a gross combination rating of 80,000.

But that same KW could also hook onto a 24 axle 96 tire trailer for a gross combination of 405,000 lbs. Just for power they may put a tandem pusher on the back to speed the move and may allow the combination weight to be 450,000 lbs. Needs a permit to move and the permit is issued on the axle weights (using tire ratings).

That is an extreme example of what the law looks at when considering the what and how to weigh a unit or a combination unit (our pick-up & RV trailer). The weight rules are the same for commercial or private vehicles. The weight does effect the paper work required for each unit, but that is a different discussion.
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'16 Chev 2500HD LTZ Z71, CC, Duramax, Allsion, 4wd, new Sept 2016, has factory fifth wheel prep so added a Curt hitch.

Traded off-'05 Chev, 2500HD, CC, SB, Duramax, Allison, 4WD, bought new April '05, sold at 179,400 miles, LBZ mouthpeice, Blocker Plate & Unplugged EGR, Air Box cut out, lost the cat, 52 US Gal (196 Litre) Titan Fuel Tank, SuperChips tuner reset to stock and retained, AirLift air bags, BrakeSmart Trailer Brake controller, PaceEdwards cover-replaced 2013, DSP Fifth Hitch, JVC KW-NT1 headunit, kept the"AutoEnginuity" scanner.

'02 GMC, 2500HD, CC, SB, D/A, 4wd, Traded in - wrong color

Last edited by turnpike; 06-28-2015 at 01:42 PM.
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Old 07-20-2015, 10:29 PM   #37 (permalink)
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I think I'm going to just replace my 2500 badges with 3500's and call it good.��
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Old 02-21-2016, 08:36 PM   #38 (permalink)
tomsws6
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Im just sayin..........
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Old 02-25-2016, 01:32 AM   #39 (permalink)
Ron Nielson
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I can't speak for differences in other years because I haven't looked for them. But in my 2008 , the differences between 3500 vs 2500 (disregarding dually vs SRW) are in the tires (265 vs 245 - 3415 capy vs 3042 capy) and in the wheels - 7" wheels needed for the 265 tires, 6 1/2: wheels for the 245's. As discussed in many threads, the axle itself will handle 10K, way over what the tires will support. If you look at your rear axle weight rating, it will be limited by the capacity of the tires, in my case, 6084 lbs for the stock 245 tires.

If having a 6830 lbs rear axle capacity with the 265's vs 6084 with the 245's is sufficient for your purposes, than that's something that can be added by most anyone. There may be other tires available, higher ply rating, etc that would boost load carrying capacity even more. And of course, you can add additional spring if you primarily carry heavy weights. Your ride will suffer accordingly, particularly when empty.

You will likely never have a problem if you are over your GVWR, but never go over your axle capacity (read tire capacity). For that you will pay dearly.
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