Skip to main content

2018 Chevrolet Suburban 3500HD 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.

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.

2018 Chevrolet Suburban 3500HD Bulb Size Chart

PositionBulb CodeAliasesTrim / PackageFactory TypeConfidenceReviewNotesShop
Low BeamD3S—Factory HID packageHIDHigh
Pending

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

AmazoneBay
High BeamD3S—Factory HID packageHIDHigh
Pending

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

AmazoneBay
Fog Light12278—If equipped / package-dependentHalogenHigh
Pending

If equipped; fog light packages can vary by trim.

Amazon
Turn Signal Front7440NA—Standard listingHalogenHigh
Pending

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

Amazon
Turn Signal Rear7440NA—Standard listingHalogenHigh
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
License Plate2825—Standard listingHalogenMedium
Pending

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

Amazon

2018 Chevrolet Suburban 3500HD Fitment Notes

Our database shows the same listed bulb sizes for the Chevrolet Suburban 3500HD across the 2016 to 2019 range. Still verify your trim, lighting package, and the bulb number in the housing 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 2018 Chevrolet Suburban 3500HD's bulbs compare to other years?

The 2018 Chevrolet Suburban 3500HD uses the same bulbs as the 2017 model.

The 2019 model continues with the same bulb sizes.

This bulb configuration covers the 2016–2019 model years. ← 2017 2019 →

Finding the best installation guide...

Other Suburban 3500HD Years

201920172016

More from Chevrolet

3A3B3C3D3E3F3GAll Light Trucks

Other Vehicles That Use D3S Bulbs

2022 Dodge Charger2022 Dodge Durango2022 Hyundai Ioniq2022 Kia Sportage2021 Dodge Challenger2019 Audi A6 Quattro

Frequently Asked Questions

Our database lists D3S for the 2018 Chevrolet Suburban 3500HD low beam headlights. Verify the bulb number on your existing bulb and confirm your trim or factory lighting package before buying.

Our database lists D3S for the 2018 Chevrolet Suburban 3500HD high beam position. Some vehicles vary by trim, lighting package, or previous housing changes.

Dim headlights on a 2018 Chevrolet Suburban 3500HD can come from aging halogen bulbs, cloudy lenses, weak electrical connections, or an incorrect bulb. Confirm the listed D3S size against the bulb in the housing before choosing a replacement or upgrade.

Our database lists 12278 for the 2018 Chevrolet Suburban 3500HD fog light position. Fog lights are often package-dependent, so verify that your vehicle is equipped with factory fog lights before ordering.

The 2018 Chevrolet Suburban 3500HD uses a single bulb (dual filament) headlight system. This means one bulb controls both high and low beams.

LED upgrades are available for many D3S applications, but fitment, beam pattern, dashboard warnings, and road-use legality can vary. Use products that list your exact bulb family, such as D3S, and verify the factory housing before buying.

Our database has a fog light entry for the 2018 Chevrolet Suburban 3500HD: 12278. Fog lights may still depend on trim or equipment package.

No — the 2018 Chevrolet Suburban 3500HD uses the same bulb sizes as the 2017 model. This configuration has been consistent across the 2016–2019 generation.

Access varies by engine bay layout and headlight housing. Before disassembly, confirm the listed D3S 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. HID D3S capsules usually cost more than common halogen bulbs. 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 2018 Chevrolet Suburban 3500HD.