2019 GMC Acadia Headlight Replacement
Lorie Anderson and 3 other contributors
Last updated on May 19, 2026
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Introduction
Go to step 1 ↓If your headlamps on your 2019 GMC Acadia are dimmer than usual, flickering on and off or do not turn on, use this guide to replace the headlamp bulb(s).
The headlamps are responsible for providing illumination for high and low-beam functions, ensuring visibility, and safety during nighttime driving.
Before using this guide, make sure that the headlamp malfunction is not due to any of the following:
Be sure that you have thoroughly followed the steps of each malfunction resolution to the listed headlamp issues to confirm that the problem is a faulty bulb.
Before beginning, make sure that you avoid touching the bulb with your naked hands or fingers to prevent getting oils on the bulb that will potentially damage it or shorten its lifespan. The replacement process is identical on both sides.
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Access the bulb housing by lifting the hood of the car.
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The bulb is behind the headlamp in the interior of the engine compartment.
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Grip the base of the bulb with your thumb and forefinger.
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Twist the socket counterclockwise.
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Once turned, pull the bulb straight back out of the socket.
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Detach the bulb from the socket cord.
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Release the locking clip from the socket cord and the bulb.
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Gently pull the socket cord from the bulb.
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Align the notches on the base of the lightbulb with the notches on the socket housing.
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Insert the bulb into the socket housing.
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Your headlight is now replaced.
Team
Northern Arizona University, Team 1-1, Konrad Spring 2026 Member of Northern Arizona University, Team 1-1, Konrad Spring 2026
NAU-KONRAD-S26S1G1
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