Standard headlight bulbs for the 2007 GMC Acadia are H11 for low beams and 9005 for high beams; fog lights, if equipped, typically use H11 as well.
Bulb sizes by function
Below are the common OEM sizes used on the 2007 Acadia by headlight function. Always confirm with your owner's manual or by verifying the bulb currently in the housing, since trims or aftermarket parts can vary.
- Low beam: H11
- High beam: 9005 (HB5)
- Fog lights: H11 (if your model has fog lamps)
Note that some aftermarket replacements or specific trims may differ, so it's wise to double-check the exact bulb type before purchasing.
Verification and replacement tips
Before replacing bulbs, ensure the vehicle is off, the headlights are cool, and you have the correct tools. The process is straightforward but may vary by trim and headlight housing design.
- Open the hood and locate the back of the headlight assembly.
- For the low beam, disconnect the power connector and twist the bulb socket counterclockwise to remove.
- Match the bulb type (H11, 9005) and install a fresh bulb, then reconnect the connector.
- Test the lights before closing the hood to ensure proper operation.
When replacing, consider upgrading if you want brighter output; many aftermarket H11 and 9005 bulbs offer higher lumens or a whiter light, but check fit and heat limits of your housing and electrical system.
Note on trims and aftermarket options
Some early Acadia models or dealer-installed packages could have variations, and some owners opt for HID or LED retrofits. Be aware that non-original bulbs can affect electrical load and headlight aim; verify alignment after installation.
If you need precise identification for your exact vehicle, consult your owner's manual, contact a GMC dealer, or bring a sample bulb to a parts retailer for verification.
Summary: For 2007 GMC Acadia, typical headlight bulb sizes are H11 for low beams, 9005 for high beams, and H11 for fog lights if equipped. Always verify with the owner’s manual or current bulb packaging, especially if you have a specific trim or aftermarket parts.