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Old 11-19-2018, 05:11 PM   #1
chris989
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max gcwr max gvwr

Anyone have insight into combined weights for duallys?

I am looking for a tow rig and most literature limits the trailer to 10,000. Most constructions trailers weigh 6-7 empty so any equipment puts me over the DOT limit.

anyone have OEM literature on total capacities?

Chris
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Old 11-20-2018, 10:16 AM   #2
cerial
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Re: max gcwr max gvwr

It varies greatly depending on the drivetrain, brakes, frame, suspension and so on. I had a 84 c30 dot rated for 14,500 gvw with a 8x12 flatbed I used to grab forklifts with. Bed was dock height and cut the forklifts up right on the bed.
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Old 11-20-2018, 10:22 AM   #3
Keith Seymore
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Re: max gcwr max gvwr

Need to know powertrain detail, right down to the rear axle ratio.

Model year would help, too.

K
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Old 11-22-2018, 11:55 AM   #4
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Re: max gcwr max gvwr

Update,

I spoke to the "heritage dept" of Gm and they confirmed even for a ~2000 3500 truck the max trailer weight is 10,000.

The 3500HD,~2002 is just 11,500.

I think these weights are more for the warranty aspect of the truck and not the capabilities. But 10K on a crew cab dually means the truck can hardly legally tow any piece of equipment. If i decent trailer weighs 4-6 only mini skid steer or excavator cold be towed.

He said there was no way to change/update the door sticker. This is a bummer because i wanted and square body to tow a cat 259d but the unit weighs 9k plus ~5K for a trailer. I know the truck can do it, just not legally.

Chris
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Old 11-22-2018, 12:53 PM   #5
Keith Seymore
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Re: max gcwr max gvwr

Bumper pull or gooseneck/5th wheel type?

For example, my GMT800 truck is rated 12,000 with the platform hitch but 26,000 for gooseneck/5th wheel.

That might be a way to bump up your legal towing capability.

K
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Old 11-22-2018, 01:01 PM   #6
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Re: max gcwr max gvwr

and tows so much better than bumper pullin .
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Old 11-22-2018, 11:38 PM   #7
chris989
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Re: max gcwr max gvwr

Quote:
Originally Posted by Keith Seymore View Post
Bumper pull or gooseneck/5th wheel type?

For example, my GMT800 truck is rated 12,000 with the platform hitch but 26,000 for gooseneck/5th wheel.

That might be a way to bump up your legal towing capability.

K
Where on your truck/sticker does it distinguish gooseneck/platform. I have never seen it split. I would like to pull a gooseneck tilt trailer. Most weigh ~8500 pounds push a skid steer of 9000. What is your max trailer weight?
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Old 11-25-2018, 11:52 PM   #8
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Re: max gcwr max gvwr

I get needing to know the specifics about the driveline. I think most of the numbers are a joke.

A good example, a 2004 3/4 ton single rear wheel has a trailer weight of 15,500 for a deisel and only 10,200 for a gasser.

I think the lower numbers were for warranty and insurance purposes??? It just stink that a 80/90s truck with a updated driveline line can not get a higher rating per Idaho DOT
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Old 11-26-2018, 03:03 PM   #9
Keith Seymore
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Re: max gcwr max gvwr

Quote:
Originally Posted by chris989 View Post
Where on your truck/sticker does it distinguish gooseneck/platform. I have never seen it split. I would like to pull a gooseneck tilt trailer. Most weigh ~8500 pounds push a skid steer of 9000. What is your max trailer weight?
It's in the generic GM Heritage Center literature for my truck (it's a bit different format that the squarebody information) -

https://www.gmheritagecenter.com/gm-...tion-kits.html

Quote:
Originally Posted by chris989 View Post
I get needing to know the specifics about the driveline. I think most of the numbers are a joke.
Well - as the guy that set the numbers for a few model years there - I can tell you there are a lot of internal requirements that you might not be aware of.

For example - one of the determining factors was the ability to launch up the 16% test grade when loaded to GCW. That knocks a lot of the ratings down farther than what you or I would do in real life.

You do things differently when it is just your truck, vs when you have to cover your a$$ for 15 million trucks.

K
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Old 11-26-2018, 05:01 PM   #10
chris989
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Re: max gcwr max gvwr

Quote:
Originally Posted by Keith Seymore View Post
It's in the generic GM Heritage Center literature for my truck (it's a bit different format that the squarebody information) -

https://www.gmheritagecenter.com/gm-...tion-kits.html



Well - as the guy that set the numbers for a few model years there - I can tell you there are a lot of internal requirements that you might not be aware of.

For example - one of the determining factors was the ability to launch up the 16% test grade when loaded to GCW. That knocks a lot of the ratings down farther than what you or I would do in real life.

You do things differently when it is just your truck, vs when you have to cover your a$$ for 15 million trucks.

K

I understand about the warranty and liability aspect. I wish there was a way to update a unit if it has been restored/modified.

For example, i did a 89 burb resto. As OEM it could not pull anything. It could barely pull away from a red light it was such a dog. It now has a fresh motor, cam, exhaust, ignition, 456 gears, 4L80 trans, bagged with new rear springs from a 3500. The thing tows like a dream.

I would much rather invest in an older truck than drop $$$$ on a new one. Plus i do not have all the emission/computer stuff to deal with.
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