2001 GMC Sierra Bulb Size Chart

Bulb sizes may vary by trim, factory lighting package, region, production date, and previous modifications. Verify the bulb number on your existing bulb before buying.

Last database update: May 2026. Manual review status: Priority audit queued.

Audit priority: High traffic truck.

Priority audit queued

This high-traffic vehicle page is in the manual review queue. Current values are structured database entries and should still be verified before purchase.

Verify before buying: check the bulb number printed on your existing bulb, confirm your trim and factory lighting package, and review the seller's fitment notes.

Disclosure: We may earn a commission from links marked Affiliate. Unmarked retailer links may be plain search links. Always verify bulb fitment before purchasing.

2001 GMC Sierra Bulb Size Chart

Position	Bulb Code	Aliases	Trim / Package	Factory Type	Confidence	Review	Notes	Shop
Side Marker	194	—	Standard listing	Halogen	Medium	Pending	Verify trim, factory lighting package, and the bulb number on the existing bulb.	Amazon
Low Beam	9006	HB4	Standard listing	Halogen	High	Pending	Verify trim, factory lighting package, and the bulb number on the existing bulb.	Amazon eBay
Fog Light	880	899	If equipped / package-dependent	Halogen	High	Pending	If equipped; fog light packages can vary by trim.	Amazon eBay
High Beam	9005	HB3	Standard listing	Halogen	High	Pending	Verify trim, factory lighting package, and the bulb number on the existing bulb.	Amazon eBay
Turn Signal Front	3157NA	—	Standard listing	Halogen	High	Pending	Verify trim, factory lighting package, and the bulb number on the existing bulb.	Amazon
Parking Light	3157NA	—	Standard listing	Halogen	Medium	Pending	Verify trim, factory lighting package, and the bulb number on the existing bulb.	Amazon
Reverse Light	3157	—	Standard listing	Halogen	Medium	Pending	Verify trim, factory lighting package, and the bulb number on the existing bulb.	Amazon
Brake Light	3157	—	Standard listing	Halogen	High	Pending	Verify trim, factory lighting package, and the bulb number on the existing bulb.	Amazon
Turn Signal Rear	3157	—	Standard listing	Halogen	High	Pending	Verify trim, factory lighting package, and the bulb number on the existing bulb.	Amazon
Tail Light	3157	—	Standard listing	Halogen	High	Pending	Verify trim, factory lighting package, and the bulb number on the existing bulb.	Amazon
License Plate	194	—	Standard listing	Halogen	Medium	Pending	Verify trim, factory lighting package, and the bulb number on the existing bulb.	Amazon
Map Light	168	—	Standard listing	Halogen	Medium	Pending	Verify trim, factory lighting package, and the bulb number on the existing bulb.	Amazon

2001 GMC Sierra Fitment Notes

Across the 1992-2015 production range, our database shows changes in the listed Turn Signal Front, Daytime Running, Low Beam positions. Use the chart above for this 2001 model, then confirm the bulb number in your vehicle before buying.

Known fitment limitations

factory HID or LED packages may use different parts
fog lights may depend on equipment package
aftermarket headlight assemblies may use different bulbs
regional models and production-date splits may differ

See an incorrect bulb size? Submit a correction.

How do the 2001 GMC Sierra's bulbs compare to other years?

The 2001 GMC Sierra changed bulb sizes from 1998. The previous model year used a different configuration.

The 2002 model switched to a different bulb configuration.

This bulb configuration covers the 2001 model years. ← 1998 2002 →

Finding the best installation guide...

Other Sierra Years

2015 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 1998 1997 1996 1995 1994 1993 1992

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9006 / HB4 Comparisons

9005 vs 9006 9006 vs H11

Frequently Asked Questions

Our database lists 9006 for the 2001 GMC Sierra low beam headlights. Verify the bulb number on your existing bulb and confirm your trim or factory lighting package before buying.

Our database lists 9005 for the 2001 GMC Sierra high beam position. Some vehicles vary by trim, lighting package, or previous housing changes.

Dim headlights on a 2001 GMC Sierra can come from aging halogen bulbs, cloudy lenses, weak electrical connections, or an incorrect bulb. Confirm the listed 9006 size against the bulb in the housing before choosing a replacement or upgrade.

Our database lists 880 for the 2001 GMC Sierra fog light position. Fog lights are often package-dependent, so verify that your vehicle is equipped with factory fog lights before ordering.

The 2001 GMC Sierra uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

LED upgrades are available for many 9006 applications, but fitment, beam pattern, dashboard warnings, and road-use legality can vary. Use products that list your exact bulb family, such as 9006 / HB4, and verify the factory housing before buying.

Our database has a fog light entry for the 2001 GMC Sierra: 880. Fog lights may still depend on trim or equipment package.

Yes — the 2001 GMC Sierra uses different bulb sizes than the 1998 model. The 2001 generation introduced this bulb configuration.

The 2001 GMC Sierra is the only year in the 2001 generation to use the 9006 bulb for the low beam headlight.

Access varies by engine bay layout and headlight housing. Before disassembly, confirm the listed 9006 low beam size on the existing bulb or owner's manual, then follow the service procedure for your exact trim.

Rules for LED headlight retrofits vary by location and by housing type. Avoid products that create glare or lack road-use compliance claims, and check local requirements before using an LED conversion on public roads.

Replacement cost depends on bulb technology, brand, and labor access. Common halogen 9006 replacements are usually cheaper than LED conversion kits. Check seller fitment notes before comparing prices.

Halogen bulbs and LED replacements differ in output, heat behavior, beam pattern, and electronics. A correct bulb code does not guarantee a correct LED beam pattern, so verify physical fit and seller compatibility notes for the 2001 GMC Sierra.

2001 GMC Sierra Bulb Size Chart

2001 GMC Sierra Bulb Size Chart

2001 GMC Sierra Fitment Notes

How do the 2001 GMC Sierra's bulbs compare to other years?

Other Sierra Years

More from GMC

Other Vehicles That Use 9006 / HB4 Bulbs

9006 / HB4 Comparisons

Frequently Asked Questions

What is the low beam headlight bulb size for a 2001 GMC Sierra?

What is the high beam headlight bulb size for a 2001 GMC Sierra?

Why are my 2001 GMC Sierra headlights dim?

Which bulb fits the 2001 GMC Sierra fog light?

Is the 2001 GMC Sierra single or dual beam?

Can I install LED bulbs on my 2001 GMC Sierra?

Does the 2001 GMC Sierra have fog lights?

Did the 2001 GMC Sierra change headlight bulb sizes from the previous year?

Is the 2001 GMC Sierra the first or last year to use 9006 bulbs?

How do I change the headlight on a 2001 GMC Sierra?

Are LED headlights legal for a 2001 GMC Sierra?

How much does it cost to replace 2001 GMC Sierra headlights?

What is the difference between halogen and LED for a 2001 GMC Sierra?