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2022 GMC HUMMER EV Owners Manual - Lighting Features



Lighting Features

Entry Lighting


The interior lamps turn on when pressing K on the remote key or opening any doors, and the dome lamp control is in the DOOR position.

Some exterior lamps also turn on when pressing K on the remote key or opening any doors. Low-Beam lamps will only turn on briefly at night, or in areas with limited lighting.

All lamps will gradually fade out after about 30 seconds.

Entry lighting can be disabled manually by closing all doors, pressing Q on the remote key, or starting the vehicle.

Exit Lighting


Some exterior lamps and interior lamps turn on when the driver door is opened after the vehicle is turned off.

The interior lights turn on when the vehicle is turned off.

The exterior and interior lamps remain on for a set amount of time, then automatically turn off.

The exterior lamps turn off immediately by turning the exterior lamp control off.

Battery Load Management


The vehicle has Electric Power Management (EPM) that estimates the battery temperature and state of charge. It then adjusts the voltage for best performance and extended life of the 12–volt battery.

When the battery state of charge is low, the voltage is raised slightly to quickly increase the charge. When the state of charge is high, the voltage is lowered slightly to prevent over charging. As this adjustment occurs, you may see the voltage move up or down on the voltmeter gauge or voltage display on the Driver Information (DIC), if equipped. This is normal. If a problem occurs, an alert will be displayed.

If the electrical loads are very high, the battery can be discharged when the vehicle is stationary. A high electrical load occurs when several features are on, such as: headlamps, high beams, rear window defogger, climate control fan at high speed, heated seats, motor cooling fans, trailer loads, and loads plugged into accessory power outlets.

EPM works to prevent excessive discharge of the battery by balancing the electrical system output and the vehicle's electrical needs. In some cases, it can temporarily reduce the power demands of some accessories.

These actions occur in steps or levels without being noticeable. In rare cases at the highest levels of corrective action, this action may be noticeable to the driver. If so, a DIC battery voltage and charging message displays. It is recommended that the driver reduce the electrical loads as much as possible.

Battery Power Protection


This feature helps prevent the battery from being drained if the interior courtesy lamps or reading lamps are accidentally left on. If any of these lamps are left on, they automatically turn off after 10 minutes when the vehicle is turned off. The lamps will not come back on again until one of the following occurs:

  • The vehicle is started.
  • The doors are closed and then re-opened.

Exterior Lighting Battery Saver


The exterior lamps turn off about 10 minutes after the vehicle is turned off, if the parking lamps or headlamps have been manually left on. This protects against draining the battery. To restart the 10-minute timer, turn the exterior lamp control to the O position and then back to the ; or 2 position.

To keep the lamps on for more than 10 minutes, the vehicle must be on.


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