Chevrolet Blazer 2020 Bulb Size
Bulb size chart
This page covers bulb sizes for the 2020 Chevrolet Blazer and is organized by lighting position so you can quickly verify the correct bulb before buying replacements. Because different lamps on the vehicle use different bases and technologies, checking the exact location matters just as much as checking the year and model.
On the 2020 Chevrolet Blazer, many exterior and interior lights are listed as LED, while several serviceable bulbs use standard replaceable types. Use this guide to match the headlight, turn signal, brake light, license plate light, dome light, and other positions to the correct bulb size for your vehicle.
Fitment can vary by trim, lighting package, market, and body style, so it is smart to confirm what is actually installed on your Blazer before ordering parts. Some lamps may be factory LED assemblies rather than simple replaceable bulbs, and some owners may have aftermarket conversions that change the original fitment. If your vehicle has been modified, or if a previous owner installed non-OE lighting, compare the old bulb to the listing and check the socket style, connector shape, and physical length before purchase. That extra step helps avoid returns and ensures the replacement works correctly.
FAQ
What bulb does the 2020 Chevrolet Blazer use for the low and high beam headlights?
The listed headlight bulb for both high beam and low beam is D3S. This applies to the 2020 Chevrolet Blazer page shown here, but you should still confirm the installed setup if your vehicle has been changed or converted.
What is the front turn signal bulb size on a 2020 Chevrolet Blazer?
The front turn signal light bulb is 7444NA. The same bulb number is also listed for the front parking light on this vehicle.
What bulb does the rear turn signal use?
The rear turn signal light bulb is 7440. If you are replacing rear signal bulbs, make sure you are matching the correct rear position rather than the front signal bulb.
What bulb size is used for the brake light on this Blazer?
The brake light bulb is 7440. This is a separate fitment from the rear turn signal listing, so it is worth checking the exact lamp position before ordering.
What bulb is used for the backup light?
The back up light bulb is 921. This is the listed bulb size for the 2020 Chevrolet Blazer backup lamp position.
What bulb does the center high mount stop light use?
The center high mount stop light bulb is 921. If the lamp is not working, confirm the bulb first and then inspect the socket and wiring if needed.
What is the license plate light bulb size?
The license plate light bulb is 168. This is a common service bulb, but you should still verify the socket and bulb shape before replacing it.
What bulb is used for the dome light?
The dome light bulb is 194. Interior lighting on the 2020 Chevrolet Blazer may vary with trim and package, so it is best to confirm the exact lamp before buying.
What bulb size is listed for the map light and cargo area light?
Both the map light bulb and the trunk or cargo area light are listed as LED. These are not given as standard replaceable bulb numbers on this page.
Are the fog lights on the 2020 Chevrolet Blazer replaceable bulbs?
The front fog light is listed as LED. In many cases, that means the lamp is an LED unit rather than a simple bulb-only replacement.
What bulb is used for the front side marker light?
The front side marker light bulb is 194. This is separate from the rear side marker listing, so be sure to match the correct location.
What bulb is used for the rear side marker light?
The rear side marker light bulb is listed as LED. Because it is shown as LED, it may not use a standard bulb number replacement.
Are the daytime running lights replaceable bulbs on this Blazer?
The daytime running light bulb is listed as LED. That usually means the DRL is part of an LED assembly rather than a conventional bulb socket.
What should I check before buying bulbs for a 2020 Chevrolet Blazer?
Check the exact lighting position, confirm whether the lamp is LED or a replaceable bulb, and compare the old bulb or socket to the listing. Trim level, package, and prior aftermarket changes can affect fitment, so verifying the installed part is the safest approach.