2010 GMC Sierra 1500 Crew Cab Owner's Manual - Page 523

Bulb Replacement For the proper type of replacement bulbs, see Replacement Bulbs on page 6‑69. For any bulb changing procedure not listed in this section, contact your dealer. Halogen Bulbs { WARNING: 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 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. 6-63