GMC 2010 Savana 1500 Cargo Owner's Manual page 138

See Tow/Haul Mode Light on page 4-36 for more
information.
Also see "Tow Haul Mode" under Towing a Trailer on
page 5-26 for more information.
Grade Braking (Six Speed Automatic
Transmission)
The Grade Braking shift modes can be activated by
pressing the tow/haul button on the dash. While
in Range Selection Mode, Grade Braking is deactivated
allowing the driver to select a desired range of gears.
Grade Braking is only active while the Tow/Haul Mode is
selected and you are not in the Range Selection Mode.
See "Tow/Haul Mode listed previously and Automatic
Transmission Operation (Six Speed Automatic
Transmission) on page 3-26 or Automatic Transmission
Operation (Four Speed Automatic Transmission) on
page 3-31 for more information on the Range Selection
Mode. Grade Braking assists in maintaining desired
vehicle speeds when driving on downhill grades by
automatically shifting to lower gears when the driver
desires to slow the vehicle by applying the brake.
This reduces wear on the braking system and increases
control of the vehicle.
Also see Towing a Trailer on page 5-26 for more
information.
3-34
Cruise Grade Braking
(Six Speed Automatic Transmission)
Cruise Grade Braking operates only while cruise
control is engaged in Tow/Haul mode. Cruise Grade
Braking assists in maintaining desired vehicle speeds
when driving on downhill grades in cruise control by
automatically shifting to lower gears when the cruise
set speed is exceeded.
While in the Range Selection Mode (RSM) mode, cruise
grade braking is not available.
See Automatic Transmission Operation (Six Speed
Automatic Transmission) on page 3-26 or Automatic
Transmission Operation (Four Speed Automatic
Transmission) on page 3-31.