GMC Sierra 2500 HD 2023 Owner's Manual page 278

Vehicle
2500/3500
*Weight distributing hitch required on vehicles equipped with On/Off Road (OOR) and Mud Terrain (MT) tires with trailers over 10,000 lbs.
1. Front of Vehicle
2. H1/H2 Body to Ground Distance
Maximum Trailer Weight
Up to 9 080 kg (20,000 lb)
Towing with Model 2500/3500 Trucks
1. Position the truck so that the trailer is
ready to connect. Keep the trailer
detached.
2. Measure the height of the top of the
front wheel opening at the fender to the
ground (H1).
3. Attach the vehicle to the trailer. Do not
attach weight distribution bars at
this time.
4. Measure the height of the top of the
front wheel opening on the fender to
the ground (H2).
Driving and Operating
Weight Distributing Hitch
Not Required*
5. Install and adjust the tension in the
weight-distributing bars per the
manufacturer s recommendations so that
the height of the front fender is
approximately H2 [(H2 H1)/4] (1/4 the
difference between the two measured
ride heights, below the secondary ride
height {H2}).
6. Visually inspect the trailer and
weight-distributing hitch to ensure that
the manufacturer s recommendations
have been met.
277
Hitch Distribution
25%