Tow Capacity - Chevy and GMC Duramax Diesel Forum
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post #1 of 4 (permalink) Old 12-28-2009, 03:08 PM Thread Starter
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Tow Capacity

I recently purchased a 2004 3500 dually Duramax (still own my 2500 Duramax which I can't give up). I am trying to figure out what the towing capacity is with a gooseneck. Chevy corporate will only tell me 12,000 lbs. I know this is impossible as my 2500 would laugh at that towing load. I am in PA and need to find out so I can properly get a horse trailer and my 3500 registered for combined wt. The trailer will be 6-7000 lbs. Any thoughts? Any ideas where I can find this info to submit to the DOT to get this done?
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post #2 of 4 (permalink) Old 12-28-2009, 03:33 PM
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post #3 of 4 (permalink) Old 12-28-2009, 03:53 PM
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max gcvwr is 23,500 for dmax dually cc/lb.

Subtract 23,500 from your unloaded truck weight. You can figure that in, from finding your max gvwr, usually 11,400 lbs, from your max payload.
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post #4 of 4 (permalink) Old 12-28-2009, 04:29 PM
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Who ever you spoke to at GM Corporate has a problem with math.
Who Knew, Right?? :LMAO

The GVWR is 11,400 lbs.
The GCWR is 23,500 lbs. They are subtracting one from the other to arrive at 12,100 lbs...which is incorrect.

The ratings below are derived by subtracting the empty truck weight (7-something k lbs) from the Gross Combined Weight Rating of 23,500 lbs.

Axle Ratio.....Max GN/Fiver Trailer/Towing Capacity lbs.**

Reg Cab Long Box 4WD, dual rear wheels 3.73 16,500

Ext Cab Long Box 2WD, dual rear wheels 3.73 16,300
Ext Cab Long Box 4WD, dual rear wheels 3.73 16,100

Crew Cab Long Box 2WD, dual rear wheels 3.73 16,200
Crew Cab Long Box 4WD, dual rear wheels 3.73 15,900

These specs are all available on the GM site, if needed for proof. At least one GM department got it right...

GMC | GMC Sierra: Trucks: 1500, 1500HD, 2500HD, 3500, Denali Pickups: Sierra Specifications

2007 LBZ 3500 LT3 DRW Crew Cab, Sulastics, Putnam XDR 15K, B&W 30K-Turnover GN+Companion, Ride-Rite Air...EFI'd by Rob
2008 LMM 3500WT DRW Crew Cab, 8 'Flat/GN, Workforce Alum Toolbox, Ride-Rite Air

Use-ta Haves 2006-6.0 3500 WT DRW ExCab Flatbed, 2005-LLY 3500 LS DRW Crew Cab, 2002-LB7 3500 LS DRW Crew Cab
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