Chrome HID Headlights Pair w/ LED DRL, Bulbs & Ballasts for GMC Terrain (2018-2021)

Replace foggy headlights on your 2018-2021 GMC Terrain SL, SLE or SLT with factory HID with this new pair. D5S bulbs and ballasts are included.

Fitment

Will NOT fit: Halogen or full-LED headlight models; 2022+ Terrain.

Common Reasons to Replace

• Yellowed, hazy, or oxidized lenses reducing light output
• Cracked lens or broken mounting tabs
• Moisture or condensation inside the housing
• Collision damage

Specs

• Low/high beam: D5S HID (included, per listing)
• DRL: LED
• Housing: Chrome
• DOT compliant
• Quantity: Pair (Left + Right)
• Condition: New

Interchange Part Numbers

OEM: 84815558, 84312727, 84355671, 84610586, 19434395, 84312726, 84355670, 84610585, 84634932, 84664073, 84720411, 84751229, 86541977, 84634933, 84664074, 84720412, 84751230. Partslink: GM2502475, GM2503475.

What's Included

• 1 x Driver side headlight assembly
• 1 x Passenger side headlight assembly
• Left and right headlights
• HID bulbs and ballasts included (per listing)

Installation

1. Disconnect the negative battery cable (HID). Release the five wheelhouse-opening molding retainers and reposition the underbody front air deflector.
2. Remove the four wheelhouse bolts and three front-tire air-deflector bolts on each side, then the hood secondary latch release cable.
3. Remove the six grille bolts and the fascia bolt, release the fascia snaps with a nylon wedge and remove the fascia with a helper; unplug its connectors.
4. Remove the four headlamp fasteners (one sits behind the fascia side retainer), pull the lamp forward and unplug the harness.
5. Install the new lamp, refit the fascia (bolts 2.5 Nm / 22 lb-in) and check the headlamp aim.

Steps compiled from GM service procedure "Front Bumper Fascia Replacement" 2018-2020 Terrain (quoted on TerrainForum); TerrainForum "2018 Headlight replacement difficulty" thread; KOEEP 2018-2021 Terrain headlight guide. Professional installation and headlight aiming are recommended.

FAQs

What bulb does it use?
D5S, per the listing. Bulbs and ballasts are included.

Will these fit a Terrain with LED headlights?
No. The listing photos show HID lamps only; LED lamps do not match.

Do I need to remove the front bumper to replace these headlights?
Yes. GM's procedure removes the front fascia; one headlamp fastener sits behind the fascia side retainer.

Can I install HID or LED kits?
Not applicable. These are factory-style HID/Xenon housings; reuse your factory HID bulbs and ballasts.