For the 2005 Chevrolet Silverado 2500HD, the low-beam headlights use 9006 bulbs, while the high beams use 9005 bulbs. The fog lights are fitted with 9145 LED bulbs. The supplied fitment data does not list a projector or non-projector headlight variation, so confirm the original bulb before ordering if the truck has non-standard replacement housings.
Exterior lighting includes 3157A bulbs for the front and rear turn signals and front parking lights. The rear brake and tail lights use 3157R, while the reverse lights use 3157. Daytime running lights use 4114, and the center stop light uses 921. License plate and glove box lighting use 194; front and rear side markers use 194NA.
Interior fitment includes a 161 ash light, 168 map light, 912 trunk light, and 93 engine light. For the courtesy and dome lights, compare the original bulb: listed options are 194 or 2721 for courtesy and 578 or 211-2 for the dome.