GVWR, GAWR, need someone to check my math [Archive] - Diesel Place : Chevrolet and GMC Diesel Truck Forums

: GVWR, GAWR, need someone to check my math


gr8twhite
12-15-2010, 12:35 AM
I've gotten my mind all turned around with regards to the above items and need someone to double check me.


The truck in question is my 98 K2500 ECLB, 6.5 TD, 4l80e, 4:10 gears.

Some numbers:

Truck -

GVWR - 8600 lbs

Rear GAWR - 6000 lbs

Frt GAWR - 4250 lbs

Max trailer weight rating (from Owners manual for 4:10 gearing) - 8,000 lbs

Trailer-

dry hitch weight - 785 lbs

unloaded weight - 6 379

GVWR - 8 780 lbs

Cargo capacity - 1900 lbs


The Math:

I can't find the actual vehicle weight anywhere (guess a trip to the scales are in order).

I'm going to guess the truck is 6000 lbs, which leaves 2600 lbs of capacity.

Subtract the tongue weight of approx 800 lbs and 300 lbs for the truck bed cap leaves 1500 lbs for fuel passengers and cargo in the truck itself.

The trailer looks to be limited to a GVWR of 8000 lbs due to the truck limit of 8,000 lbs. That leaves 780 lbs of cargo capacity in the trailer I can't use/shouldn't use for a max cargo capacity in the trailer of roughly 1100 lbs.

Sound about right?


The question:

Am I overweight for the truck pulling the trailer or is not using that 780 lbs going to keep me legal?

It's vehicle law in BC that you can't be over the GVWR and that all looks pretty close to the limits to me....

Drumaniac3000
12-15-2010, 12:54 AM
Try to find the GCWR for your truck. Subtract the actual weight of your truck (loaded, ready to roll but not hooked up to the trailer) from that GCWR to get an actual max trailer weight.

From there use the actual truck weights to determine the affects of tongue weight and payload on your overall weights.

gr8twhite
12-15-2010, 02:39 PM
Try to find the GCWR for your truck. Subtract the actual weight of your truck (loaded, ready to roll but not hooked up to the trailer) from that GCWR to get an actual max trailer weight.

From there use the actual truck weights to determine the affects of tongue weight and payload on your overall weights.
1998, I've never seen a GCWR given and there's nothing on the truck. Just the numbers I've given here.

So as far as I can tell, if I don't exceed 6000 rear axle weight and 8600 GVWR I'm gold as far as the laws are concerned.

What the truck will actually comfortably handle is probably a different story...

Drumaniac3000
12-16-2010, 12:12 AM
Yea you should be fine, just be sure to keep enough tongue weight to avoid sway.