The 2015 GMC Sierra 1500 generally uses halogen headlights as standard, with higher trims offering projector-style halogen or HID headlights. Denali models commonly include HID projector headlights and LED daytime running lights, depending on the option package.
Headlight configurations by trim
To help you identify which headlight system your Sierra may have, here’s a breakdown of the typical configurations by trim level for the 2015 model year.
- Base/WT/SLE: Usually equipped with halogen headlights, commonly in a projector-style housing or a standard reflector housing with halogen bulbs.
- SLT: Typically features projector-style headlights using halogen bulbs; HID headlights may be available as part of an optional package or upgrade.
- Denali: Generally comes with HID projector headlights as standard, plus LED daytime running lights integrated into the headlight assembly.
Note: Available lighting options can vary by market and by the specific option/packages chosen when the vehicle was built. If you’re unsure about your exact build, check the original window sticker or a VIN-based build sheet.
How to identify your Sierra's headlight type
Use visual cues and documentation to confirm the headlight type on your vehicle.
- Look for a projector lens inside the headlight housing. A distinct rounded lens typically indicates projector-style lighting, which can be paired with halogen or HID bulbs.
- Check for HID badges or markings on the headlight housing or nearby trim. Some models label HID or Xenon on the lamp assembly.
- Consult the owner's manual, window sticker, or VIN-derived build sheet to confirm the exact headlight specification for your truck.
In general, a bluish-white light with a crisp cutoff is characteristic of HID, while a warmer yellowish light is typical of halogen. LED daytime running lights (if present) appear as distinct light strips or accents separate from the main headlamp function.
Maintenance and upgrade considerations
Halogen bulbs tend to dim over time, while HID systems can degrade more slowly but may require ballast or bulb replacements. If you’re considering upgrading to HID or LED headlights, be mindful of local regulations, electrical compatibility with the vehicle, and any warranty implications. Upgrades may require additional components or adjustments to installation and alignment.
Summary
For the 2015 GMC Sierra, the standard headlights are halogen, with higher trims like Denali offering HID projector headlights and LED daytime running lights. To confirm the exact setup on your vehicle, review the window sticker or VIN/build sheet, or inspect the headlight housing for projector lenses or HID/LED markings.
What headlights does a 2015 GMC Sierra take?
GMC Sierra 1500 Bulb Size Chart (2014-2015)
| Location | Bulb Size | Watt/Lumens(per bulb) |
|---|---|---|
| Headlight Bulbs | 9012 | 65W/6500LM |
| Fog Lights | 5202 | 30W/3000LM |
| Front Turn Signal Light | 7443 | 24W/2000LM |
| Backup Light | 921 | 13W/1500LM |
What kind of headlight bulbs do I have in my 2015 Silverado?
Chevrolet Silverado 1500 (2014-2015) Bulb Size Chart
| Headlights (Low Beam) | H11 (H8 H9) |
|---|---|
| Headlights (High Beam) | 9005 (HB3) |
| Front Fog Lights | 5202 (5201) |
| Brake Light (Rear) | 7443 (7440) |
| Brake Light (High-Mounted) | T15 (912 921) |
Do I need H11 or 9005?
H11 bulbs are designed for use as low beam headlights, while 9005 bulbs are typically used for high beams. This results in a higher brightness level for the 9005 bulbs compared to the H11 bulbs.
How do I know what kind of headlights my truck has?
Go ahead and ask the dealer and say, “Just what kind of headlights do I have, man?” They'd be happy to help you out. The other option you can do, as well, is to check your vehicle handbook and see if there's a VIN number in there, on the door jamb, or in the front corner of your dashboard.