2019 Chevrolet Tahoe bulb fitment varies by headlight type. The high-beam bulb is 9005. For the low beam, Tahoe models with halogen headlights use H11, while models with HID headlights use D3S. Daytime running light fitment follows the same distinction: 9005 with halogen headlights and LED with HID headlights.
Other notable exterior lighting includes two listed fog-light options, 12278 and PSX26W. The front turn signal uses 7440A, and the rear turn signal uses 7440. Reverse lights use 921, while the brake lights use 7440R. The center stop light, parking lights, front and rear side markers, and tail lights are listed as LED.
For convenience lighting, the dome, interior, map, and trunk lights are also listed as LED. License plate lighting is listed with either 2825 or 98 fitment. Confirm whether the Tahoe has halogen or HID headlights before selecting low-beam or daytime-running-light replacements.