For the 2008 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 D1S. Confirm the headlight type before ordering.
Front fog-light fitment is listed as 9140 LED or 9145 LED. The front turn signal uses 3757A. Rear lighting includes LED tail lights, LED rear turn signals, LED brake lights, and an LED center stop light. The reverse light uses 3157.
For exterior auxiliary lighting, the license plate and front side-marker locations use 2825 or 98. Parking-light fitment has two listed options: compare the original bulb for 2825 or 98 (Option 1), or 3757A (Option 2). Interior listings include 906 for courtesy and interior lights, 578 for the dome light, 2886X for map lights, 211-2 for the trunk, and 7065 for the vanity light.