GMC 2015 Sierra Denali HD Quick Reference Manual page 17

Range Selection Mode
Range Selection Mode allows the driver to select the range of gears desired for the current
driving conditions.
Tow/Haul Mode
The Tow/Haul Mode adjusts the transmission shifts to reduce shift cycling, such as when
towing or hauling heavy loads or driving on steep grades. When towing, use the Tow/Haul
Mode to prevent damage to the engine or transmission.
Press the
on or off.
GMC Trailering Guide App
The free trailering guide app includes maximum trailer weight ratings by model along with
trailering information on hitches and equipment, GMC trailering technologies, safe trailering
techniques and more. Currently available for the iPad
iPad's app store.
The ITBC system can be used to adjust the amount of power output, or Trailer Gain,
available to the trailer brakes. The control panel is located on the left side of the instrument
panel. ITBC information is displayed on the Driver Information Center.
Tow/Haul Mode button on the end of the shift lever to turn the system
I
ntegrateD
a
utomatIc
1. Move the shift lever to the Manual (M)
position.
2. Press the + (plus) or – (minus) button on
the shift lever to select a lower or higher
gear. An M and the current gear will be
displayed on the Driver Information Center.
The transmission will be limited to the gear
selected and lower gears. If vehicle speed is
too high or too low for the requested gear, the
shift will not occur.
, download the mobile app from the
®
See Driving and Operating in your Owner Manual.
t b
raIler raKe
Adjust the Trailer Gain by pressing the +/–
adjustment buttons on the control panel.
Slide the lever to the left on the control
panel to manually apply the trailer brakes.
See Driving and Operating in your Owner Manual.
t
ransmIssIon
c (Itbc)
ontrol
17