The low beams use H11 bulbs and the high beams use 9005 (HB3); if your Impala has fog lights, those typically use 9006. Always verify with your owner's manual or by inspecting the current bulbs if you’re unsure.
Below is a quick reference of the typical bulb sizes for the 2009 Impala. Note that trims, aftermarket headlights, or factory HID options can change bulb requirements.
Bulb sizes by headlight function
This list covers the standard halogen setup found on most 2009 Impala models. If your car has factory HID or LED headlights, the bulbs and replacement process will differ and may not use these sizes.
- Low beam: H11
- High beam: 9005 (HB3)
- Fog lights (if equipped): 9006
Note: Some regional manuals refer to the high beams as 9005/HB3. If you’re unsure, check the bulb currently installed or consult a dealer parts department with your VIN.
Additional considerations
Replacement tips
Handle bulbs by the base, not the glass, to avoid skin oils that can shorten life. If possible, replace bulbs in matched pairs to ensure consistent brightness on both sides. Always use the wattage and type specified by GM to prevent electrical or fuse issues.
Summary
For a 2009 Chevy Impala, the standard halogen headlight setup generally requires H11 low-beam bulbs and 9005 high-beam bulbs, with 9006 for any fog lights if your model includes them. Always verify with the owner’s manual or by inspecting the current bulbs, as variations can occur by trim or aftermarket headlights.