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Old 11-12-2018, 11:28 AM   #1 (permalink)
mikeinga
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Tow rating question 2011 and newer

I was wondering if anyone can tell me why on the 2500hd the towing capacity drops over 2000 lbs when its a 4x4 vs 2x4 but on the 3500hd capacity only drops a 200lbs or so?

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Old 11-14-2018, 12:28 PM   #2 (permalink)
jnlperformance
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Hitch classes. Gvwr. Gcvwr.

Google.

Legal limits by drivers license(in the US... Canada and other counties I have notta clue);
C=0-13,000LBS
B=13,001-26,000LBS
A=26,001-80,000LBS (over 80 legal only on logging rds... things of that nature)

So your 2500hd fits within the class c limits.

hope this helps

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Old 11-14-2018, 01:38 PM   #3 (permalink)
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On my 2007.5 2500, there is only 200# difference between the 4x2 and the 4x4, since that is roughly the weight of the TC, front diff, and related gear. All the parts are identical between the 2500 and 3500 with the exception of the addition of rear overload springs on the 3500. Too much voodoo around towing and hauling capacity, especially since they adopted the SAE methodology. My guess is the lawyers have way too much influence on these ratings.
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Old 11-14-2018, 01:42 PM   #4 (permalink)
mikeinga
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That is what I thought from my understanding all the drive train is the same just heavier springs. What is weird is some years show that big discrepancy and other years don't
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Old 11-15-2018, 08:24 PM   #5 (permalink)
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The difference is likely in difference in EPA curb weights between the two models chosen. The SAE procedure requires you use your EPA vehicle mass as your curb weight. EPA mass must include any option that has a take rate over 33%. A lot of the 4wd models use a Denali or high country as EPA model whereas a similar 2wd model may use work model. That is how there can be a large towing difference.

Ultimately to find your particular vehicle max gooseneck/fifth wheel trailer rating, you need to weigh your vehicle with cargo that you have in weigh in vehicle. Subtract this number from GCW and you can tow this amount if you don't exceed the Rgawr and GVW of the truck with trailer attached. You need to be below GCW, GVW, and RGAWR to meet the specs of the truck.
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Old 11-16-2018, 02:15 PM   #6 (permalink)
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According to SAE:

Tow Vehicle Trailering Weight is base vehicle curb weight plus one 68.0 kg (150 lb) driver and one 68.0 kg (150 lb) front seat passenger plus 45.4 kg (100 lb) of optional equipment split evenly between front and rear axles plus the tow available trailering package and/or any required trailering content and representative aftermarket trailering equipment as specified in 5.2.
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Old 11-16-2018, 02:21 PM   #7 (permalink)
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I was actually incorrect. For vehicles over 8600 lbs GVW, you use the base curb weight plus two passengers (300 lbs), 100 lbs cargo, hitch weight.

Vehicles under 8600 lbs GVW use EPA mass.

In general, this is for advertising only. Each truck will have its max trailer weight based on your cargo minus GCW.
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