For the 2018 Chevrolet Tahoe, the low-beam bulb depends on the headlight type: models with halogen headlights use an H11, while models with HID headlights use a D3S. The high beam is a 9005.
Daytime running light fitment follows the headlight configuration. Halogen-equipped vehicles use a 9005, while HID-equipped vehicles use an integrated LED setup. The fog light listing includes both 12278 and PSX26W options.
Other notable replaceable bulbs include 7440A for the front turn signal, 7440 for the rear turn signal, 921 for the reverse light, and 7440R for the brake light. The center stop, tail, parking, front and rear side markers, dome, map, trunk, and interior lighting are listed as LED. License plate lighting is listed as either 2825 or 98.