Grade Braking and Cruise Grade
Braking (Allison Transmission
®
)
Grade Braking and Cruise Grade Braking assists when
driving on a downhill grade. It maintains the vehicle’s
speed by automatically implementing a shift schedule
that uses the engine and the transmission to slow the
vehicle. This reduces wear on the brakes system and
increases control of the vehicle. The system constantly
monitors the vehicle’s speed, acceleration, engine torque,
and brake pedal usage. It detects when the truck is on a
downhill grade and the driver’s desire to slow down by
pressing the brake.
Cruise Grade Braking is available on the
6.6L DURAMAX
®
diesel engine. Cruise Grade
Braking monitors a vehicle’s cruise state, engine torque,
acceleration, vehicle speed, and the cruise set speed.
Using this information, it detects when the truck is
accelerating on a downhill grade and will automatically
downshift to slow the vehicle if it exceeds the cruise set
speed by a certain amount.
See Cruise Control on page 3-10 for more information.
The Tow/Haul mode and Grade Braking shift modes can
be activated by pressing the button on the front of the
shift control stalk. If your vehicle has the DURAMAX
®
Diesel Engine or the 8.1L Vortec gasoline engine, Grade
Braking is only available while the Tow/Haul Mode is
selected. While in the Range Selection Mode, Grade
Braking is deactivated allowing the driver to select a
desired gear.
See Automatic Transmission Operation on page 2-26 for
more information.
Also see Towing a Trailer on page 4-67 for more
information.
2-33
Summary of Contents for 2006 Sierra
Page 5: ...These are some examples of symbols that may be found on the vehicle v ...
Page 6: ... NOTES vi ...
Page 19: ...Put someone on it Get it up to speed Then stop the vehicle The rider does not stop 1 13 ...
Page 181: ... NOTES 3 3 ...
Page 312: ... NOTES 3 134 ...
Page 412: ... NOTES 4 100 ...
Page 430: ...When you open the hood on the 8 1L V8 engine here is what you will see 5 18 ...
Page 540: ...5 128 ...
Page 548: ... NOTES 5 136 ...
Page 567: ...Engine Drive Belt Routing V6 Engines V8 Engines 6 19 ...