2000 GMC Sierra Headlight Bulb Size
Low beam
9006
High beam
9005
Order
2 × 9006 + 2 × 9005
Low beam takes a 9006 and high beam takes a 9005 — different bulbs, two of each. They are not interchangeable.
This is the first year of the 2000–2006 run for bulbs — every year through 2006 uses the same 9006/9005. See all Sierra years.
2000 GMC Sierra bulb chart
| Position | Bulb | Notes |
|---|---|---|
| Low beam | 9006 |
Two bulbs, one per side. |
| High beam | 9005 |
Different bulb from low beam — not interchangeable. |
Verified against factory service data and OEM bulb references.
Parts that fit the 2000 GMC Sierra
Other vehicles that use the 9006
These take the same low beam bulb, so the same bulb fits — only the housing differs.