2003 Chevrolet TrailBlazer Owner's Manual - Page 117

Exit Lighting With exit lighting, the interior lamps will come on when you remove the key from the ignition to help you see while exiting the vehicle. With the dome override button in the "out" position, these lights will stay on for a short period of time and then will go out. Dome Lamps The dome lamps will come on when you open a door. You can also turn the dome lamps on by turning the thumbwheel, located next to the exterior lamps knob, all the way up to the top detent position. In this position, the dome lamps will remain on until they are turned off. Reading Lamps Battery Run-Down Protection This feature shuts off the dome, courtesy, vanity, reading, glove box and underhood lamps if they are left on for more than 20 minutes when the ignition is off. This will keep your battery from running down. If the battery run-down protection shuts off the interior lamps, it may be necessary to do one of the following to return to normal operation: Press the lens on the lamp located above the doors to turn the reading lamps on and off. D Shut off all lamps and close all doors, or D turn the ignition key to RUN. This feature will also turn off the parking lamps and headlamps under most circumstances, if they are left on. If you would like to turn them back on, turn the exterior lamps knob on. 2-48