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2017 GMC Sierra 3500 HD 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: Not yet manually reviewed.

Fitment data needs verification

This page is available for browsing, but it is marked noindex until the core bulb data is complete and unresolved manual-review findings are cleared.

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.
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2017 GMC Sierra 3500 HD Bulb Size Chart

PositionBulb CodeAliasesTrim / PackageFactory TypeConfidenceReviewNotesShop
Turn Signal Front7443—Standard listingHalogenHigh
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon
Fog LightH11H8 / H9 / H16If equipped / package-dependentHalogenHigh
Pending

If equipped; fog light packages can vary by trim.

AmazoneBay
Parking Light7443—Standard listingHalogenMedium
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon
Side Marker194—Standard listingHalogenMedium
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon
License PlateW5W—Standard listingHalogenMedium
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon
Reverse Light921—Standard listingHalogenMedium
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon
Brake Light921—Standard listingHalogenHigh
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon

2017 GMC Sierra 3500 HD Fitment Notes

Across the 2007-2020 production range, our database shows changes in the listed Turn Signal Front, Parking Light, Side Marker positions. Use the chart above for this 2017 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 2017 GMC Sierra 3500 HD's bulbs compare to other years?

The 2017 GMC Sierra 3500 HD changed bulb sizes from 2016. The previous model year used a different configuration.

The 2018 model continues with the same bulb sizes.

This bulb configuration covers the 2017–2018 model years. ← 2016 2018 →

Finding the best installation guide...

Other Sierra 3500 HD Years

2020201920182016201520142013201220112010200920082007

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Frequently Asked Questions

Our database lists N/A for the 2017 GMC Sierra 3500 HD low beam headlights. Verify the bulb number on your existing bulb and confirm your trim or factory lighting package before buying.

Our database lists N/A for the 2017 GMC Sierra 3500 HD high beam position. Some vehicles vary by trim, lighting package, or previous housing changes.

Dim headlights on a 2017 GMC Sierra 3500 HD can come from aging halogen bulbs, cloudy lenses, weak electrical connections, or an incorrect bulb. Confirm the listed N/A size against the bulb in the housing before choosing a replacement or upgrade.

Our database lists H11 for the 2017 GMC Sierra 3500 HD fog light position. Fog lights are often package-dependent, so verify that your vehicle is equipped with factory fog lights before ordering.

The 2017 GMC Sierra 3500 HD uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

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

Our database has a fog light entry for the 2017 GMC Sierra 3500 HD: H11. Fog lights may still depend on trim or equipment package.

Yes — the 2017 GMC Sierra 3500 HD uses different bulb sizes than the 2016 model. The 2017–2018 generation introduced this bulb configuration.

The 2017 GMC Sierra 3500 HD is the first year in the 2017–2018 generation to use the N/A bulb for the low beam headlight.

Access varies by engine bay layout and headlight housing. Before disassembly, confirm the listed N/A 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 N/A 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 2017 GMC Sierra 3500 HD.