Chevrolet TrailBlazer 2004 Bulb Size
Bulb size chart
This page covers the bulb sizes for the 2004 Chevrolet TrailBlazer and helps you verify the correct bulb by lighting position. Whether you are replacing a headlight, a tail light, or a small interior lamp, matching the bulb to the right location is the easiest way to avoid ordering the wrong part.
The 2004 TrailBlazer uses a mix of common halogen bulbs and smaller interior bulbs, and some positions may vary by trim, body style, or lighting package. Use this guide to compare each socket location before you buy, especially if your SUV has optional fog lights or a different rear lamp setup.
For best fitment, always check the bulb currently installed in your TrailBlazer before ordering, since trim and market differences can affect the exact application. This is especially important when comparing halogen bulbs with LED replacements, because aftermarket LED conversions may need additional compatibility checks or adapters. If you are upgrading from halogen to LED, make sure the new bulb matches the socket and that the beam pattern still works properly in the housing. When in doubt, confirm the installed bulb number and compare it with the chart for your specific lighting position.
FAQ
What bulb size does the 2004 Chevrolet TrailBlazer use for the high beam headlight?
The high beam headlight bulb is 9005.
What is the daytime running light bulb size on a 2004 TrailBlazer?
The daytime running light bulb is 9005.
Which bulb fits the front turn signal on this model?
The front turn signal light bulb is 3757A.
What bulb is used for the front parking light?
The front parking light bulb is 3757A.
What size is the fog light bulb on a 2004 Chevrolet TrailBlazer?
The front fog light bulb is 880, and it may only apply to vehicles equipped with fog lights.
What bulb does the rear brake light use?
The rear brake light bulb is 3157R.
What bulb fits the rear tail light?
The rear tail light bulb is 3157R.
What bulb is used for the rear turn signal?
The rear turn signal light bulb is 3157.
What bulb size is used for the reverse light?
The back up reverse light bulb is 3157.
What is the license plate light bulb size?
The license plate light bulb can be 2825 or 98.
What bulb fits the dome light and cargo area light?
The dome light bulb and trunk or cargo area light both use 212-2.
What bulb is used for the glove box, map, courtesy, and vanity mirror lights?
The glove box, map, and courtesy lights use 194 or 7441, while the vanity mirror light uses 37.
What bulb fits the front side marker light?
The front side marker light bulb is 194NA.
Does the 2004 TrailBlazer use LED bulbs anywhere from the factory?
The center high mount stop light is listed as LED, while most other exterior and interior positions use standard bulb types.
Why should I check the bulb already installed before buying replacements?
Because trim level, body style, and lighting package can change the exact bulb application, and checking the installed bulb helps confirm the correct fit before purchase.