Whether for your own safety, for roadworthiness testing or to avoid a fine, being sure your turn signal bulbs are constantly working is fundamental. Obviously, bulbs are wearing devices that will surely burn out as time passes and as a result need to be replaced. You’re most likely in this article because one of your rear turn signals is burnt out and you’re questioning how to change the bulb of a rear turn signal on you GMC Sierra, we’ve written this post to enable you do it on your own without having to go to your auto mechanic. In a first step, we will examine inspecting a burnt-out rear turn signal bulb on your GMC Sierra and in a second step, how to replace the rear turn signal bulb on your GMC Sierra.

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How do you know if the rear turn signal bulb on your GMC Sierra is burnt-out or needs to be changed?

When you drive your vehicle you don’t constantly have the opportunity to check all the safety features of your GMC Sierra. Obviously, you are quite often in a rush and tend to get into your vehicle, make your journey and put it down immediately without taking the time to do an occasional check-up. It is as a result essential to spend some time to on occasions check the condition of your headlights and turn signals. It’s quite possible that you have a burnt-out rear turn signal on your GMC Sierra, but you didn’t detect it. Here are the two ordinary solutions to check if a rear turn signal on your car is out of order or if you need to replace it quickly:

  • When you stop, turn on the ignition on your GMC Sierra, then alternately turn on your left and right rear turn signals and get out of the car to check that they are efficient.
  • By paying attention to the sound of your turn signals. In actual fact, there is an audible warning on each car that informs you of a rear turn signal bulb burnt out on your GMC Sierra, you will recognise that the time between each “click” is much shorter, this means that you will have to replace the rear turn signal bulb or before. It’s up to you to examine and verify which one is burnt out by a visual check as on the first technique shown above.

You may have another bulb to replace, like the one of your low beam GMC Sierra or your position lights on GMC Sierra, don’t be reluctant to consult our web content to help you to realize this substitution.

Changing the rear turn signal bulb on my GMC Sierra

Now let’s go to the most important step of this content, how to replace the rear turn signal bulb on GMC Sierra? Please be aware that this procedure is fairly simple, you will need to access, from the inside of your trunk, your headlight unit, open it and replace the burnt out rear turn signal bulb on your car. If it is a bulb on your front turn signal on your GMC Sierra, see our specific guideline. However, here are the detailed description to stick to to be able to perform this work accurately:

  • To access the tail light set up, remove the carpeting or plastic cover to access the tail light assembly.
  • Use a screwdriver or torx wrench (6-pointed star) to open the tail light assembly.
  • Take off the rear indicator bulb from your burnt-out turn signal that you have previously identified by an external visual inspection, for this you will need to make a quarter turn in a counter-clockwise way
  • Replace the rear turn signal bulb on your GMC Sierra. There are two kind of bulbs, transparent bulbs when the cover is orange, or orange bulbs when the cover is transparent, choose the right model for your car
  • .

  • Remount your rear turn signal bulb and close your tail light block, then, check your new turn signal bulb is functioning in the right way

If you need more tutorials on the GMC Sierra, go to our GMC Sierra category.