Chevrolet Blazer 2019 Bulb Size
Bulb size chart
This page covers the 2019 Chevrolet Blazer bulb sizes by lighting position so you can quickly verify the correct replacement before you buy. It is organized to help you match each bulb to the right exterior or interior location, which is especially useful when a vehicle uses different bulb types for different trims or lighting packages.
For the 2019 Chevrolet Blazer, several lighting positions use LED assemblies, while others still rely on replaceable bulbs such as D3S, 921, 168, 194, 7444NA, and 7440. Checking the bulb chart by location makes it easier to find the right fit for headlights, turn signals, brake lights, license plate lights, and cabin lighting without guessing.
Fitment can vary by market, trim, body style, and factory lighting package, so it is smart to confirm what is actually installed on your Blazer before ordering parts. Some positions may be LED modules rather than serviceable bulbs, and halogen-to-LED aftermarket conversions may require compatible hardware, resistors, or error-free bulbs to avoid warning messages or beam-pattern issues. The safest approach is to compare the bulb type on this page with the bulb in your vehicle, check the owner’s manual if needed, and inspect the existing bulb or housing before purchasing replacements.
FAQ
What bulb size does the 2019 Chevrolet Blazer use for the low and high beam headlights?
The 2019 Chevrolet Blazer uses a D3S bulb for the headlight high beam and low beam listing on this page.
What is the front turn signal bulb size on a 2019 Chevrolet Blazer?
The front turn signal light bulb is listed as 7444NA for the 2019 Chevrolet Blazer.
What bulb does the rear turn signal use on this model year?
The rear turn signal light bulb is listed as 7440 on the 2019 Chevrolet Blazer.
What is the brake light bulb size for the 2019 Chevrolet Blazer?
The brake light bulb is listed as 7440 for this vehicle.
What bulb fits the backup lights?
The back up light bulb is listed as 921 on the 2019 Chevrolet Blazer.
What bulb size is used for the center high mount stop light?
The center high mount stop light bulb is listed as 921.
What bulb is used for the license plate lights?
The license plate light bulb is listed as 168.
What bulb size is used for the dome light?
The dome light bulb is listed as 194.
What bulb fits the front side marker light?
The front side marker light bulb is listed as 194.
What bulb fits the rear side marker light?
The rear side marker light bulb is listed as LED on this page, so it is not shown here as a standard replaceable bulb number.
Are the fog lights on the 2019 Chevrolet Blazer a replaceable bulb?
The fog light bulb front is listed as LED, which usually means the light is an LED unit rather than a conventional bulb-only replacement.
Are the daytime running lights replaceable with a standard bulb?
The daytime running light bulb is listed as LED, so it may be part of an LED assembly instead of a traditional bulb socket.
Why do some bulb positions on the 2019 Chevrolet Blazer show LED instead of a bulb number?
Those positions are typically equipped with LED lighting from the factory, so the page lists them as LED rather than giving a standard bulb size.
Can trim level or lighting package change the bulb sizes?
Yes. Trim and lighting package can vary by market and body style, so the exact bulb setup on a 2019 Chevrolet Blazer may differ from one vehicle to another.
What should I check before buying replacement bulbs for my Blazer?
Check the installed bulb, confirm the lighting position, and compare it with the chart on this page. This helps avoid ordering the wrong bulb, especially if your vehicle has LED equipment or a different package.