2006 Cadillac Escalade ESV Owner's Manual - Page 361

The headlamp aiming devices are under the hood near the headlamps. Headlamp Horizontal Aiming Turn the horizontal aiming screw (A) until the indicator (B) is lined up with zero. If you believe your headlamps need horizontal (H) (left/right) adjustment, follow the horizontal aiming procedure. If you believe your headlamps need only vertical (V) (up/down) adjustment, follow only the vertical aiming procedure. Adjustment screws can be turned with an E8 Torx® socket or T15 Torx® screwdriver. Once the horizontal aim is adjusted, then adjust the vertical aim. 5-47