GMC Chevrolet Silverado 2500HD 2021 Owner's Manual page 274

GCWR: Gross Combined Weight Rating
GVWR: Gross Vehicle Weight Rating
Maximum Trailer Weight Rating
GAWR-RR: Gross Axle Weight Rating-Rear
Maximum Trailer Tongue Weight Rating
See Weight-Distributing Hitch and
Adjustment under Towing Equipment 0 276
to determine if equalizer bars are required
to obtain the maximum trailer weight
rating.
See Trailer Brakes under Towing
Equipment 0 276 to determine if brakes are
required based on your trailer's weight.
The only way to be sure the weight is not
exceeding any of these ratings is to weigh
the tow vehicle and trailer combination,
fully loaded for the trip, getting individual
weights for each of these items.
A trailering information label on the B-pillar
shows tow rating information for the
vehicle.
Warning
You and others could be seriously injured
or killed if the trailer is too heavy or the
trailer brakes are inadequate for the load.
The vehicle may be damaged, and the
repairs would not be covered by the
vehicle warranty.
Only tow a trailer if all the steps in this
section have been followed. Ask your
dealer for advice and information about
towing a trailer.
Gross Combined Weight Rating (GCWR)
GCWR is the total allowable weight of the
completely loaded vehicle and trailer
including any fuel, passengers, cargo,
equipment, and accessories. Do not exceed
the GCWR for your vehicle. The GCWR for
the vehicle is on the Trailering Information
Label.
Driving and Operating
To check that the weight of the vehicle and
trailer are within the GCWR for the vehicle,
follow these steps:
1. Start with the "curb weight" from the
Trailering Information Label.
2. Add the weight of the trailer loaded with
cargo and ready for the trip.
3. Add the weight of all passengers.
4. Add the weight of all cargo in the
vehicle.
5. Add the weight of hitch hardware such
as a draw bar, ball, load equalizer bars,
or sway bars.
6. Add the weight of any accessories or
aftermarket equipment added to the
vehicle.
The resulting weight cannot exceed the
GCWR value on the Trailering Information
Label.
The gross combined weight can also be
confirmed by weighing the truck and trailer
on a public scale. The truck and trailer
should be loaded for the trip with
passengers and cargo.
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