What kindof bulbs do a Chevy Trailblazer take for headlights?

The type of headlight bulbs a Chevy Trailblazer uses depends on the year of the vehicle. There's no single answer. To find out definitively, you need to:

1. Check your owner's manual: This is the most reliable source of information.

2. Look at the bulb itself: If you can safely access the headlight bulb (with the car OFF and cooled down), the type is usually printed on the bulb.

3. Use an online parts lookup: Websites like AutoZone, Advance Auto Parts, or RockAuto allow you to enter your Trailblazer's year, make, and model to find the correct bulbs.

Without knowing the year of your Trailblazer, I cannot provide the specific bulb type.