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How to Replace Headlight Bulbs 88-98 GMC Sierra

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  1. step : Removing the Headlight (0:44)
    • Remove the two 5mm bolts from the headlight bracket
    • Pull the headlight out
    • Disconnect the headlight wiring harness
  2. step : Replacing the Headlight Bulbs (1:08)
    • Turn the base of the bulbs counterclockwise
    • Remove the old bulbs
    • Insert the new bulbs without touching them
    • Turn the base of the new bulbs clockwise
  3. step : Installing the New Headlight (1:49)
    • Reconnect the wiring harness to the headlight
    • Line up the bolt holes on the headlight bracket to the bolt holes on the vehicle
    • Replace the 5mm bolts into the headlight bracket

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Hi, I'm Mike from 1A Auto. I hope this how-to video helps you out, and next time you need parts for your vehicle, think of Thanks!

In this video, we're going to be working with our 1996 GMC Sierra K1500. We're going to show you how to remove and reinstall this headlight assembly here so we can access and replace the bulbs on the backside for our high and low beams.

If you like this video, please click subscribe. We have a ton more information on this truck, as well as many other makes and models. If you ever need parts for your vehicle, you can follow the link down in the description over to

Here are the items you'll need for this repair: 5mm socket, ratchet, socket extension, and gloves.

Remove the two 5 millimeter bolts here at the top of the grille. We're going to use the socket, ratchet, and socket extension. Once these studs are out, we can remove the headlight housing from the vehicle.

To remove and replace either bulb here is very simple. We'll lift up on this tab and push the connector off the back of the bulb. Turn it a quarter turn counterclockwise and remove the bulb from the headlight. This will be the same for the other bulb.

Be sure to wear gloves and don't touch the bulbs with your bare hands as the oils on your fingers can break them down and cause them to fail earlier than expected. All we do to reinstall is line up the tabs, place it in a quarter turn clockwise to lock it into place, and reconnect our electrical connector.

Put the assembly back into the grille. Reinstall the 5 millimeter bolts at the top. Tighten them down with a socket, ratchet, and extension.

Thanks for tuning in. We hope this video helped you out. Next time you need parts for your car, please visit Also check out our other helpful how-to and diagnosis videos.

Tools needed for replacement:

    Ratchets & Related

  • Ratchet
  • Socket Extensions

  • Sockets - Metric

  • 5mm Socket

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