2010 GMC Savana 2500 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. 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. 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