Kit Includes: (1) Passenger Side Headlight (1) Driver Side Headlight
Specification
Side Location
Driver & Passenger Side
Product Features
Direct Fit - No vehicle or wiring modification necessary
DOT, SAE, and FMVSS Compliant - Meets on-road use regulations
Matching set for a restored look
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Guaranteed Fit - DIY Solutions ensures its selected parts are quality-tested to guarantee fit and function.
Assemblies may include halogen or incandescent test bulbs that should be replaced before installation.
Features and Benefits
Direct Fit - No vehicle or wiring modification necessary
DOT, SAE, and FMVSS Compliant - Meets on-road use regulations
Matching set for a restored look
Item Condition:New
Attention California Customers:
WARNING: This product can expose you to chemicals including Chromium (Hexavalent Compounds), which is known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov
Lifetime Warranty
This item is backed by our limited lifetime warranty. In the event that this item should fail due to manufacturing defects during intended use, we will replace the part free of charge. This warranty covers the cost of the part only.
FREE Shipping is standard on orders shipped to the lower 48 States (Contiguous United States). Standard shipping charges apply to Hawaii and Alaska.
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Final shipping costs are available at checkout.
How to Replace Headlights 1999-2004 GMC Sierra 2500
Created on:
Tools used
No Tools Needed
1. Handling the Bulbs
Note: DO NOT TOUCH the bulbs- the oil from your fingers will burn into the light and foul your bulb.
Clean with rubbing alcohol and a soft cloth if the bulbs do get touched.
2. Remove the old headlight assembly
Pop the hood and secure it.
Remove the two anchor pins securing the head light assembly by twisting and pulling them up.
Remove the head light assembly.
Unplug the bulbs and harness.
3. Install the new headlight assembly
Plug in your bulbs, replacing them with new ones if necessary.
Reconnect the harness by clipping it in.
Line up the head light assembly and clip it into place.
Put the two pins back into place to secure the head light assembly.
Close the hood and enjoy your new 1A Auto headlights.
This video is brought to you by 1AAuto.com, your source for quality replacement parts and the best service on the Internet. Hi, my name's Mike Green. I want to help you save time and money repairing your vehicle. I have 20-plus years experience restoring and repairing cars and trucks. My company, 1A Auto, sells high quality replacement parts over the Internet. In this video, I'll be showing you how to install these parts. By the end of this video, you'll know how to install them and where to get them. That's going to save you time and money. Thank you and enjoy the video.
This video, we'll be replacing the headlight on a 2004 GMC Sierra, basically the same as a '99 to '06 Sierra. It is a pretty easy process. It requires no tools. So, with that, we'll get you to it.
There are two pins that hold the headlight in right there and there, and you'll twist those out and pull them up. Then, the headlight basically comes right out. Then, once it's out, you can reach in behind and unplug the lights. They're basically just little teeth that you can kind of pull with your thumb, and they unplug.
Okay, now we're going to replace the headlight. At this time, you can obviously service the bulbs if that's all you're looking to do. So, they just twist in ... or twist out and twist back in. Then, our headlights come with that whole bracket and everything, so if you're replacing your headlights at this point, you're plugging them in and then everything should install just the same way. Plug them in, put the headlight back in there. Take your pins, put them down through. Obviously you have to make sure that the headlight is all the way back in and lock them into place, and your head light's all set.
Now, we'll do a quick test. Just make sure everything's working. The headlight, the high beam, and the signal are not working. Actually that side marker's not working, so we'll really quickly replace that, and then, you're all set. Hope this helps you out. Headlights are pretty easy to service on these GMC trucks.
This video was brought to you by www.1AAuto.com, your source for quality replacement parts and the best service on the Internet. Feel free to call us toll free 888-844-3393. We're the company for you on the Internet, and there for you in person too. Thank you very much.
LHT03113
In Stock
Product Reviews
Loading reviews
4.53/ 5.034
34 reviews
5 Stars
4 Stars
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1 Star
24
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L
April 1, 2017
THIS SET FITS PERFECT ON MY GMC TRUCK. IT WILL MAKE IT LOOK NEW AGAIN, SOMEBODY WILL NOTICE AND ASK ME HOW CLEANED THEM WITH A1AUTO
GMC headlight assembly
Michael
August 11, 2017
The product arrived quickly and was an exact fit. Easy install and a great price.
Head light unit replacements
Angel
March 6, 2018
These are great replacements the only part that took some time was adjusting them so the beam was pointing in the right direction.
Bright on!
Z
March 23, 2018
Headlights with bulbs and bracket were a perfect fit and easy to install. They returned the look back to New on the front-end. Was tired of buffing off the old if costing and re-coating over and over this time on my 2002 GMC Yukon.
Thanks 1A-Auto
Headlights
B
July 9, 2018
These replacement headlights were a perfect fit, easy to replace. They also came with bulbs, that was a surprise. Most important is they a clear, and they look great.
Looking new again
Frank
July 31, 2018
Shipped very quick and good quality. Youll have to finesse these in some but they do fit. Youll also need to aim them properly. Mine were shooting the tops of trees. T25 socket is what you need to aim them. Worth the cost to freshen up your aged GM vehicle.
By far the best
Michael
December 15, 2018
After purchasing two other sets of headlights and finding a poor fit or impossible to adjust them properly, I ordered these and they were perfect out of the box. My Envoy will be next,and my first stop will be right here.
Headlight replacements
Tommy
March 6, 2019
I would highly recommend using a 1 auto for any future projects. Parts were exactly as described, fit perfectly, and it was easy to order and recieved quickly
2002 GMC Headlights
Cara
March 28, 2019
Excellent fit... now I can see at night
Should have done this long age!
Part fit
Alan
September 20, 2019
Parts fit like OEM and very bright. I can see much better on the road now.
Good lights but.....
K
October 19, 2019
Lights fit perfectly. Really made a difference in being able to see at night. The only problem is when I placed the order online Sunday evening it said I would receive them by Wednesday. The shipment didnt even go out till Wednesday.
Headlights
J
October 19, 2019
I was skeptical about ordering such an important auto part online but these headlights look better and actually shine better than the stock lights I had.
Headlight construction weak
Alan
November 2, 2019
The attachment plastic is weak compared the the original part. When putting the pins in the hole the plastic hole cracked and did not hold the light tight in place. I glued the crack and wired the light in place which is working fine now. I tried the pins before the new light was installed and they were free. I dont know if the holes in the plastic are off a little or what but they cant take any offset in hole alignment. Good news is they are bright and clear
Decent Headlight Assembly
Troy
March 7, 2020
The assembly overall was good. Only issue I ran into was the brackets that hold the bulbs in place were loose and you could tell the screws were not seated all the way. Easy fix other than having to disassemble the entire mounting bracket to get to the low beam side. After tightening down the screws, the headlights worked flawlessly and were easy to install.
2002 Sierra 1500 Headlights
Arthur
June 28, 2020
Excellent fit and easy installation.
Beautiful new headlights.
Beautiful and so much better
J
July 2, 2020
My 1998 GMC truck loves the new lights, old ones where very foggy looking. Even my wife Said they look terrible. Looking soooo good now and clear light when driving now.
FANNIE
October 4, 2020
Every fit just like it should...
Headlights
Norman
October 8, 2020
1AAuto carries the best products the headlights I ordered were oem didn't have any issues with them like others I tried before customer service outstanding they make you feel like they genuinely want to help you and make things right if there's a problem.
Great Products sold here
D
January 9, 2021
Exactly what I needed to replace my old headlights. So much brighter! Wiper blades are good quality and made a big difference.
Arrived as scheduled.
Perfect Fit
R
January 11, 2021
Fits perfectly, looks great. It took me about 8 minutes to install each light, and that's with removing the old one. They arrived ahead of schedule and in perfect condition.
headlights
D
February 19, 2021
I have been using 1a for a while. so far everything I have bought has been of good quality. The front headlights I purchased went right in and I didn't have to adjust them. No moisture showed up on the inside or fogging, so another great purchase at a very good price. I will be renewing my tail lights next.
restore or replace? REPLACE :)
J
April 1, 2021
21 year old headlights and looking at the cost and effectiveness of restoring old yellowed lenses- decided to get a new set and they were delivered quickly- and fit as promised- 2000 Yukon XL (w 400k miles)
Head light lenses replacement
F
April 10, 2021
Bought these to replace original obscured lenses. New ones fit well with attention to the locking pins placement. Clocking for bulb sockets could be better but still work. Required adjustments for aiming. Work well so far. Good price, quick delivery and great service.
Mounting bracket needs work
Joseph
April 12, 2021
The lights look great and arrived in good condition. The only issue is the mounting bracket on the lights, the outside pin doesnt line up. You have to work the outside one in first then swing the light into position to install the inside pin which lined up perfectly on both lights. The problem with that is there is needless tension on the bracket and when I went to adjust the lights the next evening one of the mounting posts had broken. 1Aauto sent a replacement immediately no questions asked but I have to wonder how long they will last.
Headlights
David
July 15, 2021
The product did not come with the rubber gaskets which fit around the light assembly. On questioning, I was told to use the old gaskets. Those were weathered and stiff.
Then when trying to adjust the lights, the adjusting screws stripped out on both.
I got a full refund and that service was great.
But the product was faulty. I hated this because I have used Eagle Eye products before.
Not as advertised.
David
August 20, 2021
Great lights but they are not OEM. The rubber seal that attaches around the outside rim of the original headlight does not fit around the replacement headlight. I have complained about this before and 1Aauto doesnt seem to care.
Carroll
November 9, 2021
Greatly improved appearance and illumination
CAROL
December 8, 2021
This is our 2nd set and theyre great
Jose
May 18, 2022
They fit great.
Reynaldo
September 28, 2022
I have been buying products from 1A Auto for a couple of years .. I have not had any problems with the products that I order Good products
William
May 6, 2023
Fits and looks like factory. I would recommend head light set
Stone
June 8, 2023
Fit perfectly and were easy to install - thank you !
Matthew
November 27, 2023
As advertised, even came with new bulbs, which I didn't realize it would.
Excellent Replacement
JP
December 29, 2023
The headlight set came in excellent condition. I ordered from another company and they were all broken. It only took less than 10 minutes to replace . Perfect fit
Customer Q&A
Do you have to adjust the headlights or do they come already set?May 15, 2021
Verner C
10
The headlights will need to be adjusted to have proper aim.
May 17, 2021
Emma F
Do these headlights fit a 2003 yukon denali?May 30, 2021
Darin T
10
These headlights are listed to fit the below Yukon models:
2000-2006 GMC Yukon SL
2000-2006 GMC Yukon SLT
2000-2006 GMC Yukon SLE
2000-2006 GMC Yukon XL 1500
2000-2006 GMC Yukon XL 1500
2000-2006 GMC Yukon XL 2500
June 1, 2021
Katie L
Will it fit gmc 3500 hd ?January 12, 2023
John D
10
Yes
January 12, 2023
Corey S
10
Yes will fit a 3500hd
January 12, 2023
Seth B
10
Hello, we would be happy to confirm fitment could you reply with your VIN#, please?
January 12, 2023
Ricale A
10
Yes
January 16, 2023
Jeff J
Customer service
877-844-3393
Monday - Friday 8:00am - 9:30pm ET Saturday - Sunday 8:00am - 4:30pm ET
GMC is a registered trademark of General Motors Company. 1A Auto is not affiliated with or sponsored by GMC or General Motors Company.See all trademarks.
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