GMC SIERRA 2020 Owner's Manual page 299

298 Driving and Operating
Vehicle Series
1500
1500
2500/3500
1. Front of Vehicle
2. H1/H2 Body to Ground
Distance
Trailer Weight
Up to 3 175 kg (7,000 lb)
Over 3 175 kg (7,000 lb)
Up to 9 080 kg (20,000 lb)
Towing with Model 1500 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).
Weight-Distributing Hitch
Usage
Not Required
Required
Not Required
5. Install and adjust the tension in
6. Visually inspect the trailer and
Hitch Distribution
50%
50%
25%
the weight-distributing bars per
the manufacturers
recommendations so that the
height of the front fender is
approximately H2 [(H2 H1)/2]
(halfway between the two
measured ride heights).
weight-distributing hitch to
ensure that the manufacturers
recommendations have
been met.