Saver - GMC Sierra Limited 1500 2019 Owner's Manual

184 Lighting
Exterior Lighting Battery

Saver

The exterior lamps turn off about
10 minutes after the ignition 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 position and then back to
the or position.
To keep the lamps on for more than
10 minutes, the ignition must be on
or in ACC/ACCESSORY.