For the 2011 Chevrolet Silverado 3500HD, the low-beam headlights use H11 bulbs, while the high beams use 9005 bulbs. The supplied fitment data does not identify separate projector or non-projector headlight applications, so confirm the housing configuration before ordering if your truck has a specialized lighting setup.
Other useful exterior bulb matches include 5202 LED for the fog lights and H11 LED for the daytime running lights. The front turn signals, parking lights, and front side markers use 4157NA bulbs.
- Reverse lights: 3047
- Brake and tail lights: 3047R
- Center stop light: 921
- License plate lights: 168
For the interior, the dome and map lights use 212-2 bulbs, the trunk light uses 912, and the vanity lights use 6612F. Rear turn signals use 3047. Replace bulbs with the matching listed size and verify the original bulb before installation, particularly when selecting LED replacements.