GMC Yukon 2023 Owner's Manual page 279

278 Driving and Operating
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 the engine, axle,
or other parts.
Perform the first oil change before heavy
towing.
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 0 217. If the
transmission downshifts too often, a
lower gear may be selected using Manual
Mode. See Manual Mode 0 207.
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 with Rear Cross Traffic Alert RIM
(RCTA, RTCB, and RAB), these features will be
disabled when towing a trailer.
Warning
When towing a trailer, exhaust gases
may collect at the rear of the vehicle and
enter if the liftgate, trunk/hatch,
or rear-most window is open.
When towing a trailer:
Do not drive with the liftgate, trunk/
hatch, or rear-most window open.
Fully open the air outlets on or under
the instrument panel.
Warning (Continued)
Also adjust the climate control system
to a setting that brings in only outside
air. See Climate Control Systems in
the Index.
For more information about carbon
monoxide, see Engine Exhaust 0 203.
Towing a trailer requires experience. The
combination of the vehicle and trailer is
longer and not as responsive as the vehicle
itself. Get used to the handling and braking
of the combination by driving on a level
road surface before driving on public roads.
The trailer structure, the tires, and the
brakes must be all be rated to carry the
intended cargo. Inadequate trailer
equipment can cause the combination to
operate in an unexpected or unsafe manner.
Before driving, inspect all trailer hitch parts
and attachments, safety chains, electrical
connectors, lamps, tires, and mirrors. See
Towing Equipment 0 285. If the trailer has
electric brakes, start the combination
moving and then manually apply the trailer
brake controller to check the trailer brakes
work. During the trip, occasionally check
(Continued)