Chevrolet Silverado 4500HD 2022 Manual page 244

Tow/Haul assists when pulling a heavy
trailer or a large or heavy load.
Tow/Haul Mode is designed to be most
effective when the vehicle and trailer
combined weight is at least 75% of the
vehicle's Gross Combined Weight Rating
(GCWR). See Weight of the Trailer under
Trailer Towing 0 236.
Tow/Haul Mode is most useful when towing
a heavy trailer or carrying a large or
heavy load:
through rolling terrain
in stop-and-go traffic
in busy parking lots
Operating the vehicle in Tow/Haul Mode
when lightly loaded or not towing will not
cause damage; however, it is not
recommended and may result in unpleasant
engine and transmission driving
characteristics and reduced fuel economy.
Integrated Trailer Brake Control System
The vehicle may have an Integrated Trailer
Brake Control (ITBC) system for use with
electric trailer brakes or most electric over
hydraulic trailer brake systems. These
instructions apply to both types of electric
trailer brakes.
This symbol is on the Trailer Brake Control
Panel on vehicles with an ITBC system. The
power output to the trailer brakes is
proportional to the amount of vehicle
deceleration. This available power output to
the trailer brakes can be adjusted to a wide
range of trailering situations.
The ITBC system is integrated with the
vehicle s anti-lock brake system. In trailering
conditions that cause the vehicle s anti-lock
brake system to activate, power sent to the
trailer's brakes will be automatically
adjusted to minimize trailer wheel lock-up.
This does not imply that the trailer has
anti-lock brakes.
If the vehicle s brake or anti-lock brake
systems are not functioning properly, the
ITBC system may not function fully or at all.
Make sure all of these systems are fully
operational to allow the ITBC system to
function properly.
Driving and Operating
The ITBC system is powered through the
vehicle's electrical system. Turning the
ignition off will also turn off the ITBC
system. The ITBC system is fully functional
only when the ignition is in ON/RUN.
Warning
Connecting a trailer that has an air brake
system may result in reduced or
complete loss of trailer braking, including
increased stopping distance or trailer
instability which could result in serious
injury, death, or property damage. Only
use the ITBC system with electric or
electric over hydraulic trailer brake
systems.
243