The standard halogen setup on most 2008 GMC Yukons uses H11 for low beams and 9005 for high beams, with fog lights typically using H11 if your model has them.
The 2008 Yukon offered a mix of lighting configurations depending on trim and options. While many came with halogen headlights, some trims or packages included factory HID headlights, which use a different bulb type altogether. This article lays out the common halogen sizes and provides guidance on HID/LED configurations to help you confirm the exact bulb type for your specific vehicle.
Halogen headlight bulb sizes
Before you replace bulbs, note that the following sizes cover the typical halogen configuration found on most 2008 Yukon models. If your Yukon has HID or LED headlights, these sizes may not apply.
What to expect by headlight configuration
Bulb sizes depend on whether your Yukon has low-beam and high-beam projectors in a single housing or uses additional fog lamps. If you have factory HID, the sizes below do not apply.
- Low beam: H11
- High beam: 9005 (HB5)
- Fog lights (if equipped): H11
Note: Always verify by checking the current bulbs or the owner's manual, as aftermarket replacements and trim variations can differ.
Factory HID or LED headlights
Some 2008 Yukons were available with factory HID or LED headlights. When these configurations are present, the bulb types are different from the standard halogen setup and require the appropriate ballast and wiring. Typical GM HID configurations use D-series bulbs (for example D1S or D2S for low-beam projectors, with variations by model). Always confirm the exact bulb designation for your vehicle based on your trim, VIN, and lighting system.
Replacements for HID/LED systems should use compatible bulbs and components, and professional installation is recommended if you are not experienced with ballast-based lighting systems.
Summary
Bottom line: For most 2008 GMC Yukon models with standard halogen headlights, use H11 for low beams, 9005 for high beams, and H11 for fog lights if equipped. If your Yukon uses factory HID or LED headlights, refer to the owner's manual or VIN to determine the correct bulb type (commonly D1S/D2S for HID). Always verify before purchasing replacements and consider professional service for ballast-connected lights.