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How To Replace Headlight Assembly 1992-99 GMC K1500

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How To Replace Headlight Assembly 1992-99 GMC K1500

Created on: 2020-05-07

Watch this video to learn how to install a new headlight assembly on your 1992-99 GMC Sierra.

Installation Video
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We're going to remove the four mounting screws for this lens assembly right here. Slide this out of the way. Now, we're going to remove the mounting bolts that hold on this whole plastic grille assembly here. All right. So, there should be one. Should be one here. All right. Now that we have those bolts out, let's go ahead and give this a little tug. This gives us plenty of space. Now, if you were to look right here, you can see one of the mounting bolts. You can see another one right over here. And then if you were to come right down through here, you're going to find another one and another one. Remove all four of those. We'll get the headlamp loose. Then we'll remove the wiring that goes to the bulbs.

All right. At this point, we can move this around quite a bit. Get these right out of here, sockets. Carefully set that down. Do the same thing here. See if I can get this one out. For this one, it's going to be much easier just to get the wiring off first, and then you'll be able to turn the bulb to be able to remove it. Take a look at that bulb. If you need to replace it, now's a great time. See if we can weasel this out of here now. There it is, friends.

Now, if you look at the top of your headlamp assembly, you're going to notice this adjustment right here. This is to make your lamp assembly go left and right. And this one right here is to make your lamp assembly aim up or down. Just keep that in mind.

So, now's a great time to go ahead and install your bulbs. If you wanted to get some new ones, perfect. Gonna take this, wan to to carefully try to work it so it goes inside here. Fall right in. Okay. So, now, I'm just gonna rest it like this. I'm going to reconnect in my wiring. this one. Come on. Try to grab it here. All right. So, you've got a longer wire and a shorter one. The shorter one's obviously going to go to the closer area. Something that's important to pay attention to is the wiring goes behind this bracket right here. You don't want to put it on the other side because it'll get crushed when you go to mount this in. The other wire, same thing. Behind, that looks great. Now, we're going to put this up against the body. We're going to line up those bolt holes and then we'll start in all of our bolts before we tighten any of them down.

All right. So, now's a perfect time to align those headlights. The reason for that is because the alignment points, like I said, are located right here. And if this is in the way, well, you're not gonna be able to get to them. It's time to get these bolts back in. I'm just going to start it in. We'll start them all in and then we'll snug them up.

All right. Let's tighten them all up. That one didn't hold very well. We'll line it up. Oh yeah, that looks great. Let's get our screws in. Okay. Now, I'm just gonna snug them up. Beautiful.

This is going to be a general tutorial on how to aim your brand new TRQ headlamp assemblies. Okay. So, looking at your brand new TRQ headlamp assembly, you're going to see where your low beam is, and you'll see a little dot right in the center. And that is the access point, okay? So, what we're going to do is we're going to mark that with an erasable marker just so it's easier to see. Next, what we need to do is measure from the level ground up to this point and take note of that measurement. Now, we're just going to pull the car up to our wall. On our vehicle, we remember that the measurement was 28 inches for our access point. Your vehicle may be different, but that's where I'm going to put this tape. Just above that 28 inches. We'll do same on the other side. Okay. So, let's just back the vehicle up straight back 25 feet from the wall. And now that we moved our vehicle 25 feet back from the wall, we're going to start with our measurement here. That's where the headlamp center is. We're gonna go down 4 inches on the driver side.

On the passenger side, we have our line here. What we need to do is go down 2 inches. To adjust the driver side, we're going to cover our passenger side headlamp. If you look at the backside of your headlamp assembly, you're going to see something that looks like this. This is the adjustment. Some of these headlight assemblies have one, two, or even more of them, but you should at least have one. This is how we're going to adjust the headlight beam. Now, we're going to lower the top part of the beam down to just below this line. When you turn the adjustment to the right, it brings the beam up. And if you turn it to the left, it'll bring the headlight beam down. And this is this way on most vehicles. Let's continue on to doing the passenger side. All right. We properly aligned our TRQ headlamp assemblies.

Okay. And on the quality TRQ headlamps for a pickup truck, the procedure is going to be the same. You're going to find your center dot, mark it, and then you'll measure from the level ground up to your dot. So, once your headlamps are properly adjusted, it'll be time to adjust your fog lamps. You'll notice on the driver side, the focal point is all the way at the bottom right now. I would like to bring it up so it meets up with approximately the bottom of the focal point of the headlight. Some fog lamps have an adjuster, others don't. The ones that do have an adjuster, you would just turn the adjustment to the left or to the right to adjust the beam up and down to where it needs to be. Now, with your TRQ headlamps and fog lamps properly aligned, you can drive down the road safely.

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