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Old 03-11-2019, 03:03 PM   #1 (permalink)
k5hauler
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Towing capacity calculation?

Is this the general calculation for towing, and is it correct?

Tow vehicle is 2009 GMC HD 2500 crew cab 4wd 6' bed: ~6000# curb weight
trailer: 3500# gvw (Bumper pull)
payload: 5900# gvw (truck being pulled on trailer)
Total ~15,400#

I believe the capacity of the tow vehicle is ~14000#, but could be mistaken. Without any additional payload (driver, tools, etc.), this basically exceeds the tow capacity of the 2009 gmc.

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Last edited by OkDually; 03-11-2019 at 03:11 PM. Reason: prefix
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Old 03-11-2019, 03:20 PM   #2 (permalink)
k5hauler
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Got the trailer weight wrong. It's 2540#. Therefore total is at 14,440#'s. Basically still exceeds the towing capacity of the vehicle, correct?

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Old 03-11-2019, 04:41 PM   #3 (permalink)
BanksLB7Duramax
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I’m not sure what engine your truck has, but since you’re on here I’m going to assume a Duramax. And I’m not sure if that’s a bumper pull or gooseneck trailer, but going off of the weight of it I’m going to assume a bumper pull.

That truck is rated to tow 13,900 pounds. And I can’t remember exactly, but I wanna say the GCWR of that truck is in the 21K-22K range. And I’m quite positive your truck is closer to 7,000 pounds than it is 6,000 pounds. So basically your truck is rated for 9,200 pounds GVWR, that means the load that is on all four tires of your truck, including tongue weight from a trailer can’t exceed 9,200 pounds. So let’s say your truck with load and tongue weight is 9,000 pounds, subtract that from let’s say 22,000 GCWR, that leaves you with the ability to tow a trailer that has 13,000 pounds on it tires, but the actual trailer weight can be more because the 9,000 pound load that your truck is carrying includes tongue weight. So that trailer could be over 14,000 pounds itself. So basically you are well under the towing capacity of your truck and your truck will safely haul that load, in fact a half-ton truck could pull that safely.
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