as far as i know the drl are your high beams with a resistor to dim them
how do I adjust headlights
Low Beam: 9006 High Beam: 9005 See sources and related links below for more information on the 2006 Chevrolet Trailblazer bulb/lamp part numbers.
It is possible that both of the fuses are bad for the low beam headlights and the cruise control. A loose ground wire could cause the fuses to blow.
Dimmer switch controls the selection of either Hi-Beam or Low-Beam headlights
Turn your low beam headlights on and pull the headlight control out towards you
With your low beam headlights on , pull the headlight control towards you
High beam headlights reveal objects at a distance of at least 450 feet away. High beam headlights allow the driver to view obstacles in the road much sooner than low beam headlights.
Use your high-beam headlights at night whenever it is legal and safe.
You use low beam headlights when you're in a town or city in any location.
On most vehicles, the low beam headlights are the outside pair of lights. This is true when the headlights are side by side. When the two sets of lights are stacked, the low beam headlights are usually on the bottom.
Car headlights have to be able to "dip" so as not to dazzle oncoming traffic, they therefore can switch between a "high" beam and a "dipped" beam and thus have a dual beam.
Take it to a dealer. There's no way you'll do it. Proud owner of one.