For the 2013 Dodge Grand Caravan, both the low-beam and high-beam headlights use an H11 bulb. The daytime running light fitment is listed as H11 LED, while the fog lights use 2504 LED bulbs.
For exterior signaling, the front and rear turn signals and parking lights use 3757A bulbs. The front side markers use 2827, reverse lights use 3157, and the license plate lights use 168.
Interior fitments include 578 bulbs for the dome, reading, and interior lights, while the courtesy and glove-box lights use 194. The map lights use PC579, and the instrument panel uses PC74. For the trunk light, compare the original bulb before ordering: the listed options are 578 or 561.