2012 Chevrolet Suburban Owner's Manual - Page 409
2012 Chevrolet Suburban Manual
Page 409 highlights
Vehicle Care 10-37 Bulb Replacement For the proper type of replacement bulbs, see Replacement Bulbs on page 10‑39. For any bulb‐changing procedure not listed in this section, contact your dealer. 9. Make sure that the light from the headlamp is positioned at the bottom edge of the horizontal tape line. The lamp on the left (A) shows the correct headlamp aim. The lamp on the right (B) shows the incorrect headlamp aim. 10. Repeat Steps 7 through 9 for the opposite headlamp. Halogen Bulbs 7. Locate the vertical headlamp aiming screws, which are under the hood near each headlamp assembly. The adjustment screw can be turned with an E8 Torx® socket. 8. Turn the vertical aiming screw until the headlamp beam is aimed to the horizontal tape line. Turn it clockwise or counterclockwise to raise or lower the angle of the beam. { WARNING Halogen bulbs have pressurized gas inside and can burst if you drop or scratch the bulb. You or others could be injured. Be sure to read and follow the instructions on the bulb package.
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