Chevrolet 1999 Silverado 1500 Pickup Owner's Manual page 337

Headlamps
1. Remove the two pins on the top of the headlamp
assembly. To remove the pins, turn the outer pin
outward and pull it straight up. To remove the inner
pin, turn it inward and pull it straight up.
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A. Low Beam Headlamp
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B. High Beam Headlamp
2. Pull the headlamp lens assembly out.
3. Unplug the electrical connector.
4. Turn the bulb counterclockwise and remove it from
the headlamp lens assembly.
5. Put the new bulb into the lens assembly and turn it
clockwise until it is tight.
6. Plug in the electrical connector.
7. Put the headlamp lens assembly back into the
vehicle. Install and tighten the two pins.
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