For the 2009 Cadillac SRX, the high-beam headlight uses a 9005XS bulb. Low-beam fitment depends on the headlight system: models with halogen headlights use 9006XS, while models with HID headlights use a D1S bulb. Confirm the headlight type before ordering, since these low-beam applications are not interchangeable.
The front turn signal uses a 3757A bulb, and the reverse light uses a 3157. The brake, center stop, tail, and rear turn-signal lights are listed as LED applications. Front parking-light fitment has two listed configurations: compare the original bulb for Option 1, which may use 2825 or 98, or Option 2, which uses 3757A. The front side marker uses either 2825 or 98, while the license plate light also lists 2825 and 98. Interior applications include 906 for the courtesy and interior lights, 578 for the dome light, 2886X for the map light, 211-2 for the trunk, and 7065 for the vanity light.