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2021 GMC Sierra 2500HD Owners Manual - Interior Lighting



Interior Lighting

Instrument Panel Illumination Control


This feature adjusts the brightness of all illuminated controls. The instrument panel illumination control is next to the exterior lamp control.

: Press + to brighten or − to dim the lights.

This feature is functional at night, or when the headlamps or parking lamps are on.

Dome Lamps


The dome lamp controls are in the overhead console.

To operate, press the following buttons:

OFF : Turns off the dome lamps when any door is opened, K on the remote key is pressed, or when the vehicle is turned off. An indicator light on the button turns on when the dome lamp override is activated. Press j OFF again to deactivate this feature.

ON/OFF : Turns the dome lamps on or off manually.

Reading Lamps


There are reading lamps on the overhead console and over the rear seats. These lamps come on when any door is opened.

To operate, the ignition must be on, or in ACC/ACCESSORY, or using Retained Accessory Power (RAP).

Front Reading Lamps

The front reading lamps are in the overhead console.

Press the lamp lenses to turn the front reading lamps on or off.

Rear Reading Lamps

The rear reading lamps are over the rear seats.

Press the lamp lens to turn the rear reading lamps on or off.


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