GMC Sierra Denali 1500 2023 Owner's Manual page 245

244 Driving and Operating
Pulling a boat out of the water on a
trailer.
Using the vehicle for public off-road
recreational driving. See Off-Road Driving
0 200 and
Hill and Mountain Roads 0 205.
Using terrain mode in extreme conditions
that cause the wheel(s) to slip can lead to
excessive heat in the transfer case causing
four-wheel drive and terrain mode to
automatically turn off, leaving the vehicle in
two-wheel drive. Four-wheel drive will
automatically re-engage once the transfer
case has cooled, then terrain mode can be
turned back on.
When in Terrain Mode, the vehicle will shift
automatically but may hold a lower gear
longer to maximize engine torque. A unique
pedal map, transmission shift pattern, and
rpm control are utilized to give better
control at lower speeds and over rough
terrain. When the vehicle comes to a stop,
Vehicle Hold is engaged. TCS will be
optimized for maximum torque transfer
across axles, and Active Braking During Lift
Throttle will be engaged.
Active Braking During Lift Throttle:
Automatically applies light braking,
similar to heavy engine braking of
four-wheel-drive low.
Applies light braking in D (Drive) until the
vehicle is at idle speeds. In Manual L1 and
Manual L2, moderate braking may stop
the vehicle.
Reduces trailer braking.