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GMC 20873493 Mirror

2010-2012 GMC Terrain

Customer Questions & Expert Answers (2)
20873493 GM Mirror Illustration 1 of 1
  • Part Description
    Mirror, Inside/Outside Rear View
  • Position
    Rear
  • Manufacturer
    General Motors
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  • Specifications
  • Fitment
  • Q&A
  • Product Specifications

    BrandGenuine GMC
    Manufacturer Part Number20873493
    Part DescriptionMirror; Mirror, Inside/Outside Rear View
    Item Dimensions10.7 x 6.2 x 2.9 inches
    Item Weight3.40 Pounds
    PositionRear
    ConditionNew
    Fitment TypeDirect Replacement
    ManufacturerGeneral Motors
    SKU20873493
    Shipping & ReturnShipping Policy Return Policy
    Warning: California's Proposition 65
  • Vehicle Fitment

    Year Make Model Engine Important vehicle option details
    2010-2012 GMC Terrain4 Cyl 2.4L, 6 Cyl 3.0LSLE1 SUV, SLE2 SUV, SLT SUV
  • Customer Questions & Expert Answers

    Q:
    I would like to confirm if this is the correct part number for my vehicle. Please advise. Thank you.
    A:
    You can Select Your Vehicle to check if 20873493 fits your vehicle.
    Posted and answered by GM Parts Specialist Henry
    Q:
    What should be done if the Side View Mirrors don't operate as expected for the 2011 GMC Terrain? Posted by Tynita W.
    A:
    If the mirrors don't operate as expected, you can perform several checks:With the ignition in the ACC position and the engine off, operate the mirror control switch through all functions for both left and right side mirrors. Listen for the sound of the electric motors inside the mirrors.If you hear the motors but the mirror glass doesn't move, there might be a problem with the drive mechanism inside the mirror. In such cases, the defective mirror must be replaced as a unit.If there is no sound coming from the mirrors and they don't operate, first check the fuses. If the fuses are okay, proceed with further diagnosis.Remove the mirror control switch and have its continuity checked by a dealer service department or qualified shop.Check the ground connections.If the mirror still doesn't work, remove the mirror and check the wires at the mirror for voltage. If there's no voltage in each switch position, check the circuit between the mirror and control switch for opens and shorts.If there is voltage, remove the mirror and test it off the vehicle with jumper wires. Replace the mirror if it fails this test. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Bob / Sep 25, 2025

Genuine GM Part 20873493, the Right Choice

To ensure reliability, purchase GM part # 20873493 Mirror. It is sometimes referred to as GMC Side View Mirrors. 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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