What is the low beam headlight bulb size for a 2018 Chevrolet Suburban 3500 HD?

The 2018 Chevrolet Suburban 3500 HD uses a H11 bulb for the low beam headlights. We recommend upgrading to LED for better visibility.

What is the high beam headlight bulb size for a 2018 Chevrolet Suburban 3500 HD?

The high beam bulb size for the 2018 Chevrolet Suburban 3500 HD is 9005.

Why are my 2018 Chevrolet Suburban 3500 HD headlights dim?

Dim headlights on a 2018 Chevrolet Suburban 3500 HD can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a H11 LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 2018 Chevrolet Suburban 3500 HD fog light?

The 2018 Chevrolet Suburban 3500 HD typically does not come with factory fog lights in all trim levels. If your vehicle is equipped with them, check the manual as sizes can vary by trim.

Is the 2018 Chevrolet Suburban 3500 HD single or dual beam?

The 2018 Chevrolet Suburban 3500 HD uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

Can I install LED bulbs on my 2018 Chevrolet Suburban 3500 HD?

Yes, the 2018 Chevrolet Suburban 3500 HD comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a H11 LED conversion kit for the low beams.

Did the 2018 Chevrolet Suburban 3500 HD change headlight bulb sizes from the previous year?

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

Is the 2018 Chevrolet Suburban 3500 HD the first or last year to use H11 bulbs?

The 2018 Chevrolet Suburban 3500 HD is the last year in the 2017–2018 generation to use the H11 bulb for the low beam headlight.

How do I change the headlight on a 2018 Chevrolet Suburban 3500 HD?

Turn off the vehicle and open the hood. Locate the headlight assembly from behind, remove the dust cover or retaining clip, disconnect the wiring harness, twist the old H11 bulb counter-clockwise to remove it, then insert the new bulb and reassemble. The whole process typically takes 10 to 30 minutes per side depending on accessibility.

Are LED headlights legal for a 2018 Chevrolet Suburban 3500 HD?

LED bulbs used off-road or in auxiliary lights are legal everywhere. For on-road headlight use, legality varies by state. Many states allow LED retrofits as long as the beam pattern meets DOT standards. For the best legal compliance, choose a DOT-approved H11 LED kit that is designed as a direct replacement and produces a proper cutoff pattern without excessive glare.

How much does it cost to replace 2018 Chevrolet Suburban 3500 HD headlights?

A pair of halogen H11 bulbs costs $15 to $40, while LED conversion kits run $25 to $60 per pair. If you have a shop do the work, expect an additional $20 to $50 in labor per bulb. Replacing them yourself at home saves the labor cost and usually takes under 30 minutes.

What is the difference between halogen and LED for a 2018 Chevrolet Suburban 3500 HD?

Halogen bulbs produce a warm yellow light (around 3200K), last 500 to 1000 hours, and draw more power. LED bulbs emit a brighter white light (5000-6000K), last 25,000+ hours, and use less energy. LED upgrades for the H11 position are available as direct plug-and-play replacements.

The 2018 Chevrolet Suburban 3500 HD is the last model year to use this bulb configuration (2017–2018).

Fitment Guaranteed for 2018 Chevrolet Suburban 3500 HD

What Size Bulbs Does a 2018 Chevrolet Suburban 3500 HD Use?

Correct headlight, fog light, and tail light bulb sizes. Sourced from OEM catalog data.

Installation Difficulty

Moderate (Dust covers often present)

Est. Replacement Cost

$15 - $40 (Halogen) / $30+ (LED)

What Lighting System Does the 2018 Chevrolet Suburban 3500 HD Have?

When it comes to nighttime visibility, the 2018 Chevrolet Suburban 3500 HD relies on an arrangement of 8 specialized bulbs. It features a comprehensive lighting system powered by a dual-bulb halogen configuration using separate H11 low beam and 9005 high beam bulbs for precise light distribution.

Can You Put LED Bulbs in a 2018 Chevrolet Suburban 3500 HD?

For a Chevrolet built for the road and trail, LED upgrades provide the high-contrast lighting needed for better obstacle detection. We recommend starting your upgrade with the H11 low beams, as they see the most use. Adding a matching 9005 LED kit later will complete the look and ensure consistent lighting performance.

2018 Chevrolet Suburban 3500 HD Bulb Size Chart

Position	Bulb Size	Shop
Daytime Running	9005	Buy 9005 →
High Beam	9005	Buy 9005 →
Turn Signal Front	7440NA	Buy 7440NA →
Low Beam	H11	Buy H11 →
Reverse Light	921	Buy 921 →
Brake Light	7440	Buy 7440 →
Turn Signal Rear	7440	Buy 7440 →
License Plate	W5W	Buy W5W →