What is the low beam headlight bulb size for a 2020 GMC Terrain?

The 2020 GMC Terrain uses a N/A bulb for the low beam headlights. We recommend upgrading to LED for better visibility.

What is the high beam headlight bulb size for a 2020 GMC Terrain?

The high beam bulb size for the 2020 GMC Terrain is N/A.

Why are my 2020 GMC Terrain headlights dim?

Dim headlights on a 2020 GMC Terrain can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a N/A LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 2020 GMC Terrain fog light?

The 2020 GMC Terrain uses a H11 bulb for the fog light position.

Is the 2020 GMC Terrain single or dual beam?

The 2020 GMC Terrain uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

Can I install LED bulbs on my 2020 GMC Terrain?

Yes, the 2020 GMC Terrain comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a N/A LED conversion kit for the low beams.

Does the 2020 GMC Terrain have fog lights?

Yes, the 2020 GMC Terrain takes a H11 bulb for the fog light position.

Did the 2020 GMC Terrain change headlight bulb sizes from the previous year?

Yes — the 2020 GMC Terrain uses different bulb sizes than the 2019 model. The 2020 generation introduced this bulb configuration.

Is the 2020 GMC Terrain the first or last year to use N/A bulbs?

The 2020 GMC Terrain is the only year in the 2020 generation to use the N/A bulb for the low beam headlight.

How do I change the headlight on a 2020 GMC Terrain?

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 N/A 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 2020 GMC Terrain?

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 N/A 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 2020 GMC Terrain headlights?

A pair of halogen N/A 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 2020 GMC Terrain?

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 N/A position are available as direct plug-and-play replacements.

The 2020 GMC Terrain has a unique bulb configuration not shared with adjacent model years.

Fitment Guaranteed for 2020 GMC Terrain

What Size Bulbs Does a 2020 GMC Terrain 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 2020 GMC Terrain Have?

The 2020 GMC Terrain utilizes a refined lighting configuration featuring 6 distinct bulb positions. It features a standard lighting system powered by a dual-bulb halogen configuration using separate low beam and high beam bulbs for precise light distribution. This model belongs to the late years of the Terrain's 2010-2020 production span.

Can You Put LED Bulbs in a 2020 GMC Terrain?

For a GMC 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 low beams, as they see the most use. Adding a matching LED kit later will complete the look and ensure consistent lighting performance. Don't forget the H11 fog lights; switching these to LED can dramatically improve your visibility in adverse weather.

2020 GMC Terrain Bulb Size Chart

Position	Bulb Size	Shop
Fog Light	H11	Buy H11 →
Brake Light	7440	Buy 7440 →
Turn Signal Rear	7440	Buy 7440 →
Tail Light	7440	Buy 7440 →
License Plate	W5W	Buy W5W →
Reverse Light	921	Buy 921 →

How do the 2020 GMC Terrain's bulbs compare to other years?

The 2020 GMC Terrain changed bulb sizes from 2019. The previous model year used a different configuration.

This bulb configuration covers the 2020 model years. ← 2019

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Other Terrain Years

2019 2018 2017 2016 2015 2014 2013 2012 2011 2010