Chevrolet Silverado 2007 Owner's Manual page 474

Trailer Brake Control Panel
A. Manual Trailer Brake Apply Lever
B. Trailer Gain Adjustment Buttons
474
The ITBC system has a control panel located on
the instrument panel to the left of the steering
column. See Instrument Panel Overview
(Base/Uplevel version) on page 212 or Instrument
Panel Overview (Premium version) on page 215
for more information on location. The control panel
allows you to adjust the amount of output,
referred to as trailer gain, available to the electric
trailer brakes and allows you to manually apply
the trailer brakes. The Trailer Brake Control Panel
is used along with the Trailer Brake Display
Page on the DIC to adjust and display power
output to the trailer brakes.