2020 Chevrolet Blazer bulb fitment uses D3S bulbs for both the low-beam and high-beam headlights. The supplied fitment data does not identify a projector or non-projector headlight split, so verify the original headlamp and connector before ordering.
Several exterior lighting positions are listed as LED rather than replaceable bulb numbers. These include the fog lights, daytime running lights, rear side markers, and tail lights. The front turn signal and parking light use 7444NA bulbs, while the front side marker uses a 194.
- Brake lights: 7440
- Rear turn signals: 7440
- Center stop light: 921
- License plate lights: 168
- Dome light: 194
- Map and trunk lights: LED
No reverse-light bulb fitment is listed in the supplied data. Check the vehicle’s existing bulb or lamp assembly when replacing any LED-equipped position.