Chevrolet TrailBlazer 2021 Bulb Size

Bulb size chart

H9 Bulbs

Used for: Headlight Bulb High Beam

Sealight L2 Series

Sealight L2 Series

Simple installation: it’s been designed as a plug-and-play lighting solution, so does not need the help of a mechanic to fit into most cars. No pain of replacing bulbs often: a maximum level of heat dissipation is achieved when they are in use thanks to the ball-bearing cooling fan, the copper thermal heat sink, and high-density aluminum body, ensuring up to 50,000 hrs lifespan. No spots: with a 360-degree light output radius, these bulbs remove all dark spots and provide a much wider angle of output than with standard bulbs.

$27.94

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PIAA 19665 H9 Xtreme White Plus

PIAA 19665 H9 Xtreme White Plus

If you’re looking for better visibility on your road, then Xtreme White Hybrid bulbs should be at the top of your list. These high-quality glasses and alloy filaments provide more contrast to what can sometimes become dim or dull light from stock lamps so that way not only do they allow car lovers to see farther but also safer as well! Made with safety in mind from the start these products have been designed by professionals who know exactly how important it is to have functioning bulbs in any season and during every weather.

$67.25

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KATANA H9 LED Headlight Bulbs

KATANA H9 LED Headlight Bulbs

Introducing the KATANA H9 LED Headlight Bulbs, the perfect solution for all your lighting needs on the road. This LED headlight bulb is 400% brighter than the original halogen lamp, providing you with 4 times the brightness and allowing you to see farther and wider. The H9 LED headlight has a 360° beam angle that ensures you have a perfect beam pattern without any dark spots, making it safe to drive in all weather conditions - be it rainy, foggy, or snowy. The installation process is simple and hassle-free, with a plug-and-play design that is almost 1:1 to the halogen lamp. You don't need any tools or modifications, and the installation can be completed in just 10 minutes. The KATANA H9 LED Headlight Bulbs are compatible with 99% of vehicles and come with an upgraded CANBUS that ensures seamless operation.

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View all 10 replacement options for size H9 →

9005 Bulbs

Used for: Headlight Bulb Low Beam

View all 30 replacement options for size 9005 →

921 Bulbs

Used for: Back Up Light Bulb

View all 14 replacement options for size 921 →

7440 Bulbs

Used for: Brake Light Bulb, Tail Light Bulb Outer, Turn Signal Light Bulb Front, Turn Signal Light Bulb Rear

View all 8 replacement options for size 7440 →

168 Bulbs

Used for: Tail Light Bulb Inner, Glove Box Light Bulb

View all 17 replacement options for size 168 →

2825 Bulbs

Used for: Dome Light Bulb, Map Light Bulb

View all 12 replacement options for size 2825 →

194 Bulbs

Used for: Map Light Bulb, Trunk or Cargo Area Light

View all 21 replacement options for size 194 →

This 2021 Chevrolet TrailBlazer bulb size guide helps you verify the correct bulbs by lighting position, so you can replace a failed lamp with confidence. Because trim and lighting equipment can vary by market and body style, it is always smart to match the bulb to the exact location on the vehicle before ordering.

Use this page as a quick reference for exterior and interior lighting on the 2021 TrailBlazer, including headlights, turn signals, brake lights, license plate lights, and cabin bulbs. The listed bulb sizes are organized by position to make it easier to find the right fit for your specific TrailBlazer setup.

Fitment can differ between trims and lighting packages, especially when comparing halogen and LED-equipped models or vehicles sold in different markets. Some positions may use factory LED modules instead of replaceable bulbs, and aftermarket LED conversions can change the bulb type or require additional adapters. Before buying replacement bulbs, check the installed bulb, inspect the socket, and confirm the exact lighting position on your TrailBlazer to avoid ordering the wrong part.

FAQ

What bulb does the 2021 Chevrolet TrailBlazer use for the low beam headlight?

The low beam headlight bulb listed for the 2021 Chevrolet TrailBlazer is 9005.

What bulb does the high beam headlight use on this TrailBlazer?

The high beam headlight bulb listed for the 2021 Chevrolet TrailBlazer is H9.

What is the front turn signal bulb size for the 2021 TrailBlazer?

The front turn signal light bulb is 7440.

What bulb fits the rear turn signal on the 2021 Chevrolet TrailBlazer?

The rear turn signal light bulb is 7440.

What bulb is used for the brake light on this model year?

The brake light bulb listed for the 2021 Chevrolet TrailBlazer is 7440.

What bulb fits the outer tail light on the 2021 TrailBlazer?

The outer tail light bulb is 7440.

What bulb is used for the inner tail light?

The inner tail light bulb listed for this vehicle is 168.

What is the back up light bulb size for the 2021 Chevrolet TrailBlazer?

The back up light bulb is 921.

Are the fog lights on the 2021 TrailBlazer replaceable bulbs?

The fog light listing for this vehicle is LED, which may indicate a factory LED light source rather than a standard replaceable halogen bulb. Check the installed assembly before purchasing parts.

What bulb does the license plate light use?

The license plate light bulb is listed as LED for the 2021 Chevrolet TrailBlazer.

What bulb fits the center high mount stop light?

The center high mount stop light bulb is listed as LED.

What bulb size is used for the dome light?

The dome light bulb listed for this TrailBlazer is 2825.

What bulb fits the map lights in the cabin?

The map light bulb listing includes 194 and 2825, so the exact bulb can depend on the specific lamp position and trim.

What bulb is used for the glove box light?

The glove box light bulb is 168.

What bulb fits the trunk or cargo area light?

The trunk or cargo area light bulb is 194.

Do trim levels affect bulb fitment on the 2021 Chevrolet TrailBlazer?

Yes. Trim level, lighting package, and market can affect bulb type and whether a light uses a replaceable bulb or a sealed LED assembly.

Should I verify the installed bulb before ordering replacements?

Yes. Checking the installed bulb is the best way to confirm fitment, especially if the vehicle has been modified or uses an LED package.

Chevrolet TrailBlazer Bulb Size by Year