Make sure this part fits

GMC 84791979 Composite Assembly

2016-2017 GMC Terrain

Customer Questions & Expert Answers (2)
84791979 GM Composite Assembly Illustration 1 of 1
  • Part Description
    Headlamp, Capsule/Headlamp/Fog Lamp
  • Position
    Front
  • Replaces
    84048491, 23342705, 84064625
  • Manufacturer
    General Motors
Make sure this part fits
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  • Specifications
  • Fitment
  • Q&A
  • Product Specifications

    BrandGenuine GMC
    Manufacturer Part Number84791979
    Part DescriptionComposite Assembly; Headlamp, Capsule/Headlamp/Fog Lamp
    Item Dimensions29.4 x 18.5 x 13.1 inches
    Item Weight8.00 Pounds
    PositionFront
    ConditionNew
    Fitment TypeDirect Replacement
    Replaces84048491, 23342705, 84064625
    ManufacturerGeneral Motors
    SKU84791979
    WarrantyThis genuine GM part is guaranteed by GM's factory warranty.
    Shipping & ReturnShipping Policy Return Policy
    Warning: California's Proposition 65
  • Vehicle Fitment

    Year Make Model Engine Important vehicle option details
    2016-2017 GMC Terrain4 Cyl 2.4L, 6 Cyl 3.6LSLT SUV
  • Customer Questions & Expert Answers

    Q:
    Do these parts fit my vehicle?
    A:
    You can Select Your Vehicle to check if 84791979 fits your vehicle.
    Posted and answered by GM Parts Specialist Raul
    Q:
    How to remove and install the Headlight housing on GMC Terrain? Posted by Rubens D.
    A:
    Uncrew the wire from the car's negative energy source, take off the front cover of your bumper, get rid of the screws holding the upper headlamp cover in, pry off the mounts on the side of the headlight, and ease the housing out of the bumper. Pry out both headlight attachment pins using a strong pull, then take the housing away from the bumper cover's opening. Unplug the circuits linking to the lamp sockets, then reversing your steps lets you install the lights back.
    You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Nicholas / Aug 30, 2025

Genuine GM Part 84791979, the Right Choice

To ensure reliability, purchase GM part # 84791979 Composite Assembly. It is sometimes referred to as GMC Headlight. Directly from GM, genuine parts are superb with regards to quality, longevity, and fit. Every single part passed stringent quality testing, so you can be sure that it's safe, durable, and built to perform like your original parts. This part fits specific GMC Terrain models.

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