For the 2009 Chevrolet Silverado 2500HD, the low-beam headlights use H11 bulbs, while the high-beam headlights use 9005 bulbs. The supplied fitment data does not list a headlight-type variation, so these are the listed sizes for this model year.
The fog lights use 5202 LED bulbs, and the daytime running lights use H11 LED bulbs. At the front, both the turn signals and parking lights use 4157NA bulbs.
Rear lighting includes 3047 bulbs for the reverse lights and rear turn signals, plus 3047R bulbs for the brake and tail lights. The center stop light uses a 921 bulb. For other exterior lighting, the license plate lights use 194 bulbs.
Interior applications include 212-2 bulbs for the dome and map lights, while the trunk light uses a 912 bulb. Verify the existing bulb and connector before ordering, especially when replacing LED-designated applications.