GMC HUMMER EV 2023 Owner's Manual page 264

Driving Characteristics and
Towing Tips
Warning
You can lose control when towing a
trailer if the correct equipment is not
used or the vehicle is not driven properly.
For example, if the trailer is too heavy or
the trailer brakes are inadequate for the
load, the vehicle may not stop as
expected. You and others could be
seriously injured. The vehicle may also be
damaged, and the repairs would not be
covered by the vehicle warranty. Pull a
trailer only if all the steps in this section
have been followed. Ask your dealer for
advice and information about towing a
trailer with the vehicle.
Driving with a Trailer
Trailering is different than just driving the
vehicle by itself. Trailering affects handling,
acceleration, braking, and durability.
Successful and safe trailering requires proper
use of the correct equipment.
The following information has many
time-tested, important trailering tips and
safety rules. Many of these are important
for your safety and that of your passengers.
Read this section carefully before towing a
trailer.
When towing a trailer:
Become familiar with, and follow all state
and local laws that apply to trailer
towing. These requirements vary from
state to state.
State laws may require the use of
extended side view mirrors. If your
visibility is limited or restricted while
towing, install extended side view mirrors
on your vehicle, even if not required.
Do not tow a trailer during the first
800 km (500 mi) of vehicle use to prevent
damage to vehicle.
Do not drive over 800 km/h (50 mph) and
do not make starts at full throttle during
the first 800 km (500 mi) of trailer
towing.
Tow in D (Drive). Tow/Haul Mode is
recommended for heavier trailers. See
Driver Mode Control 0 194.
Driving and Operating
If equipped, the following driver assistance
features should be turned off when towing
a trailer:
Park Assist
Automatic Parking Assist (APA)
Reverse Automatic Braking (RAB)
If equipped, the following driver assistance
features should be turned to alert or off
when towing a trailer, unless equipped with
Super Cruise:
Automatic Emergency Braking (AEB)
Front Pedestrian Braking (FPB)
If equipped with Lane Change Alert (LCA),
the LCA detection zones that extend back
from the side of the vehicle do not move
further back when a trailer is towed. Use
caution while changing lanes when towing a
trailer.
If equipped, the Rear Cross Traffic Alert
(RCTA) feature is automatically disabled
when a trailer is attached to the vehicle.
Towing a trailer requires experience. The
combination of the vehicle and trailer is
longer and not as responsive as the vehicle
itself. Become familiar with handling and
braking of the combination by driving on a
level road surface before driving on public
roads.
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