Interior Lighting; Instrument Panel Illumination; Control; Dome Lamps - GMC SIERRA 2020 Owner's Manual

172 Lighting
If the vehicle is in P (Park),
R (Reverse), or N (Neutral) the
Cargo Lamp Switch causes the
lights to cycle through the following
states for each button press:
- Initial Press:
- CHMSL/Cargo Bed Lights - On
- Cargo Mirror Lights - On
- Cargo Switch Indicator (if
equipped) - On
- Next Press: (if with in 5 seconds of
the previous button press):
- CHMSL/Cargo Bed Lights - On
- Cargo Mirror Lights - Off
- Cargo Switch Indicator (if
equipped) - On
- Next Press:
- CHMSL/Cargo Bed Lights - Off
- Cargo Mirror Lights - Off
- Cargo Switch Indicator (if
equipped) - Off
Become familiar with and follow all
state and local laws that apply to
cargo lamp operation.

Interior Lighting

Instrument Panel
Illumination Control
This feature controls the brightness
of the steering wheel and instrument
panel lights. The instrument panel
illumination control is next to the
exterior lamp control.
: Press + to brighten or
to dim the lights.

Dome Lamps

The dome lamp controls are in the
overhead console.
To operate, press the following
buttons:
OFF : Press to turn off the
dome lamps when a door is open.
An indicator light on the button will
turn on when the dome lamp
override is activated. Press
OFF again to deactivate this feature
and the indicator light will turn off.
The dome lamps will come on when
doors are opened.