Do I have this math/ understanding right?
Got a new 2020 GMC 2500 with DMax. Door sticker says just over 3300 for payload. Tires are 3750. So... manufacture's say hitch weight for xx toyhauler is.... let's say 3500lbs... im guessing tha...
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The 2020 2500 Dmax has a 6390 rawr with 17" wheels and 6600 rawr with the 18/20" wheels.
I would say your truck has the 6600 rawr which is the lessor of a axle assy/wheel/tire or rear spring pack. On newer trucks the rear spring pack is usually the weak link.
GM specs shows the new and very high GVWR is 11550 lbs for the 2500 Dmax/18/20" wheels. This is where the higher GVWR based payload packages are overloading some 1/2 ton....3/4 ton....one ton SRW trucks low RAWR numbers on certain models when the payload is used in the bed/over the rear axles.
I wouldn't go over a 3400 lb load on the rear suspension...in the bed.
You can always upgrade the wheels or spring pack to match your tires 3700 lb capacity. The rear axle is a 11.5" AAM who rates it in the 10xxx range so the axle assy is no problem.
One thing I learned from loading several hundred long flatdeck trailers with wheeled equipment and pallets/etc...... and dozens of long GN stock trailers is there is no center point like a teeter totter for weight calculation simply because one end sits on the truck. Generally we load calves and first year lighter weight stock in the trailers front....then heavy stock (bulls or cows) over and aft of the trailers axles. Its surprising how little weight is taken off the hitch when 4k-6k lbs of bulls are placed back there.
I would say your truck has the 6600 rawr which is the lessor of a axle assy/wheel/tire or rear spring pack. On newer trucks the rear spring pack is usually the weak link.
GM specs shows the new and very high GVWR is 11550 lbs for the 2500 Dmax/18/20" wheels. This is where the higher GVWR based payload packages are overloading some 1/2 ton....3/4 ton....one ton SRW trucks low RAWR numbers on certain models when the payload is used in the bed/over the rear axles.
I wouldn't go over a 3400 lb load on the rear suspension...in the bed.
You can always upgrade the wheels or spring pack to match your tires 3700 lb capacity. The rear axle is a 11.5" AAM who rates it in the 10xxx range so the axle assy is no problem.
One thing I learned from loading several hundred long flatdeck trailers with wheeled equipment and pallets/etc...... and dozens of long GN stock trailers is there is no center point like a teeter totter for weight calculation simply because one end sits on the truck. Generally we load calves and first year lighter weight stock in the trailers front....then heavy stock (bulls or cows) over and aft of the trailers axles. Its surprising how little weight is taken off the hitch when 4k-6k lbs of bulls are placed back there.
