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Chevrolet Tahoe 2018 Bulb Size
Bulb size chart
Fog Light Bulb Front - 12278, PSX26W
Headlight Bulb High Beam - 9005
Headlight Bulb Low Beam(with halogen headlights) - H11
Headlight Bulb Low Beam(with HID headlights) - D3S
Back Up Reverse Light Bulb - 921
Brake Light Bulb - 7440R
Center High Mount Stop Light Bulb - LED
Daytime Running Light Bulb(with halogen headlights) - 9005
Daytime Running Light Bulb(with HID headlights) - LED
License Plate Light Bulb - 2825, 98
Parking Light Bulb - LED
Side Marker Light Bulb Front - LED
Side Marker Light Bulb Rear - LED
Tail Light Bulb - LED
Turn Signal Light Bulb Front - 7440A
Turn Signal Light Bulb Rear - 7440
Dome Light Bulb - LED
Interior Door Light Bulb - LED
Map Light Bulb - LED
Trunk or Cargo Area Light - LED
12278 Bulbs
Used for: Fog Light Bulb Front
PSX26W Bulbs
Used for: Fog Light Bulb Front
9005 Bulbs
Used for: Headlight Bulb High Beam, Daytime Running Light Bulb(with halogen headlights)
H11 Bulbs
Used for: Headlight Bulb Low Beam(with halogen headlights)
D3S Bulbs
Used for: Headlight Bulb Low Beam(with HID headlights)
921 Bulbs
Used for: Back Up Reverse Light Bulb
7440R Bulbs
Used for: Brake Light Bulb
2825 Bulbs
Used for: License Plate Light Bulb
98 Bulbs
Used for: License Plate Light Bulb
7440A Bulbs
Used for: Turn Signal Light Bulb Front
7440 Bulbs
Used for: Turn Signal Light Bulb Rear
This page helps you find the correct bulb sizes for the 2018 Chevrolet Tahoe by lighting position, so you can match the right bulb to the right socket before you buy. Because Tahoe lighting can vary by trim, headlight type, and market, checking the exact location on the chart is the safest way to confirm fitment.
For the 2018 Chevrolet Tahoe, the chart includes exterior bulbs such as headlight, fog light, turn signal, brake, reverse, license plate, side marker, parking, and tail light positions, plus interior bulbs like dome, map, door, and cargo area lights. Use the bulb position first, then compare the listed size or type to your vehicle’s setup.
Fitment can differ between trims and lighting packages, especially when comparing halogen and HID-equipped Tahoes. For example, low beam and daytime running light bulb types are not the same on every version, and aftermarket LED conversions may change the bulb you need or require extra adapters, resistors, or housings. If your Tahoe has been modified, or if you are unsure which lighting package it came with, check the installed bulb before ordering and verify the connector, base style, and physical length. That quick check can save time and prevent returns.
FAQ
What bulb size does the 2018 Chevrolet Tahoe use for the low beam headlight?
It depends on the headlight setup. 2018 Chevrolet Tahoe models with halogen headlights use H11 low beam bulbs, while models with HID headlights use D3S low beam bulbs.
What is the high beam bulb size on a 2018 Tahoe?
The high beam headlight bulb size listed for the 2018 Chevrolet Tahoe is 9005.
Which bulb does the daytime running light use on a 2018 Chevrolet Tahoe?
That depends on the headlight package. Tahoes with HID headlights use an LED daytime running light bulb, while Tahoes with halogen headlights use a 9005 bulb for the daytime running light position.
What bulb size is used for the front turn signal on this SUV?
The front turn signal light bulb for the 2018 Chevrolet Tahoe is 7440A.
What bulb size is used for the rear turn signal?
The rear turn signal light bulb listed for the 2018 Chevrolet Tahoe is 7440.
What bulb size is used for the brake light?
The brake light bulb for the 2018 Chevrolet Tahoe is 7440R.
What is the reverse light bulb size on a 2018 Tahoe?
The back up reverse light bulb size is 921.
What bulb does the license plate light use?
The license plate light bulb sizes listed for the 2018 Chevrolet Tahoe are 2825 and 98.
What fog light bulb fits the front fog lamp on a 2018 Chevrolet Tahoe?
The front fog light bulb options listed are PSX26W and 12278.
Are the parking light and side marker bulbs LED on the 2018 Tahoe?
Yes, the chart lists LED bulbs for the parking light, front side marker light, and rear side marker light positions on the 2018 Chevrolet Tahoe.
Does the 2018 Chevrolet Tahoe use LED bulbs for interior lights?
Yes, the chart lists LED bulbs for the dome light, map light, interior door light, and trunk or cargo area light positions.
Why should I verify the bulb by position instead of buying by model name only?
Because the 2018 Chevrolet Tahoe can have different bulb types depending on trim, body style, lighting package, and whether the vehicle has halogen or HID headlights. Matching the bulb by position helps avoid buying the wrong part.
Can I switch my Tahoe to LED bulbs if it came with halogen bulbs?
Often yes, but aftermarket LED conversions may need extra parts such as resistors, adapters, or compatible housings. It is important to confirm the base type and fit before converting.
What should I check before ordering replacement bulbs for my 2018 Tahoe?
Check the installed bulb, confirm the lighting position, and verify whether your Tahoe has halogen or HID headlights. Also compare the socket, connector, and bulb shape to the listing before purchasing.