SEALIGHTH1 LED Fog Bulb, 33000LM 800% Super Brighter, 6500K Hi/Low Beam, With 15000RPM Cooling Fan, 60000HRS+ Lifespan, Pack of 2

First off, thanks to the people here and on the gm-trucks forum for the product recommendation. For some reason, the Amazon parts compatibility engine doesn't think that the H11/H8 Low Beam 9005/HB3 High Beam combo fits in the 2020 Silverado Custom Trail Boss, but it does.I didn't find time to install these until more than two months after I ordered them, so I'm glad that they did fit, since I was past the return date. I was expecting a painful installation, but it was nothing of the sort. I am an experienced amateur mechanic, so maybe that made it easier. Plus, I have long skinny arms, so I'm sure that helped also. I read on the gm-truck forum that some people removed the T15 torx bits from the inner fender wells and went that way to get to the bulbs, so I was prepared for that, but I never had to do that.I started on the passenger side, since there seemed to be more room over there. I removed both rubber dust caps, but just pulling on them and rocking them until they came loose. I worked on the upper (low-beam) bulb first. I just reached down, twisted the bulb counter clockwise until it released from the light assembly, and the pulled the bulb out. I then reached down and pushed on the retention clip to remove the bulb from the electrical socket. Since the LED H11 bulb has retention clips on both sides of the connector, it could clip in either way. At this point, I got out my multimeter to determine the polarity of the connector. I turned on the headlights and put my meter on the leads until I saw which one was positive (red probe on the positive side and a positive voltage showing on the meter). I used a red sharpie to mark the red side, then turned off the headlights. Looking at the truck's connector from the front, with the retention clip up top, the right side was positive. This was the same for the low beam on both sides of my truck.After determining the polarity, I connected the + side of the LED connector to the side I marked red, then I gently maneuvered the LED into the light housing's bulb hole. Starting at the angle that I removed the old bulb, I reinstalled the new bulb, wiggling it until it was flush against the housing. I then rotated the LED bulb assembly down until it was vertical and against the stops in the housing. Before going any further, I turned on the headlights to make sure that the new bulb came on, and it did. Wow, these are bright!After verifying that it worked, I took all of the cables, and arranged them inside of the bulb assembly, so that they fit under the dust cap and nothing was blocking the fan. I've attached a picture showing everything in the assembly, but before I finished adjusting how everything laid in there. After getting everything inside and situated, I reinstalled the dust cap. This was done by just pushing on one side and then working my way around, applying pressure around the circle until it all was flush with the plastic. Not difficult at all.I again turned on the headlights to verify that the low beam still worked. I moved down to the lower bulb, which is the high beam. I did the same thing as above, twisting out the bulb from the housing, then disconnecting the electrical connection. Luckily, the LED 9005 high beam bulb only has a retention clip on one side, so I didn't bother checking the polarity. I clipped the electrical connection together, then put the new bulb into the housing, rotating it until it locked down. Again, I tested the lights, this time activating the high beams to verify that it worked, which it did. I then arranged the wires and reinstalled the dust cap.Onto the driver's side. This was more difficult as the wiper fluid bottle of over there, limiting hand room. But, I said a quick prayer, and worked by feel, removing the dust caps, then the low beam bulb. (Make sure it isn't hot from being on earlier, or you could get burnt.) I tested for polarity and it was the same as the other side. Hooked up the electrical connector, Installed the LED bulb into the housing and locked it into place. Tested the low beams and it came on. Arranged the wires inside of the housing and reinstalled the dust cap.Onto the lower, high beam bulb on the driver's side. This one was a little tight for access, but I was able to reach down and get the bulb right out with no problem. Do as the other one, hook up the electrical connection and insert the LED bulb into the housing, rotating it into place. Test the high beams and it too worked. Arrange the wires in the housing and reinstall the dust cap.All done and it probably took about 30 minutes, with me taking my time. If I knew it would have been so easy, I would have installed them sooner.I also took this opportunity to adjust my low beam headlight height. For some reason, I felt that my low beam pattern was not projected high enough. Using a long, #2 phillips screwdriver in the adjusters, I rotated to the left (like loosening a screw) one turn and it raised up my light pattern slightly. I was aimed against my garage door and saw the pattern move. I was surprised that the owner's manual didn't have instructions to adjust them, saying that they were preset at the factory....Anyways, these lights were pretty easy to install and are incredibly bright. I don't see any flicker or any other problems.I wish this technology existed seven years ago when I installed HID projectors in my motorcycle headlight housing. I would have just put bulbs like this in instead, as it would have been much easier, but I do like the sharp cutoff on my HID projectors. (I don't like having a mechanical shutter for the HID high/low beam on them though.)

Compatible, bright and safe for demanding vehiclesI installed the SEALIGHT S1 LED H4s on my 2011 Hyundai with adapted magnifying glass headlights, and they have been an excellent choice. My vehicle does not support high-power bulbs, and these 60W and 6500K ones fit perfectly without errors, without excessive heating or the need for adapters.The beam of light is clean, defined and without glare, ideal for night driving in dark areas. Unlike other more powerful bulbs that I had tried (and that ended up generating electrical problems or bad focus), they offer a perfect balance between power, efficiency and compatibility.Very satisfied with the performance and visibility. Fully recommended for vehicles with electrical limitations that still need good lighting.

Plug and play as stated. Lights are brighter than traditional Halogen bulbs. Lights are working good for last several months.

Overall, I am happy with the bulb for the price. They installed mostly like the instructions. Had to use some of the additional enclosed o-rings to get them to seal properly. The lights at night are very "white" in color, which I wanted, but I kinda expected them to be a bit "brighter". They are sufficient and certainly better than the OEM ones I replaced on my 95 suburban. Time will tell how long they last....

They work really good and bright. Nice quality and fits perfectly on my truck.

Quick delivery.Nice quality, fast and easy to install .Super bright !Ive bought 4 different sets for 4 different vehicles and Im very happy with them .Im asked about them often because theyre so bright , many times Im told theyre the brightest they have seen .Very nice upgrade !I have them installed in my 04 Silverado , 09 Tahoe , 05 Tahoe and 04 Frontier .

I tried another brand of LED 9005/9006 bulbs and they would not fit in my 2005 Silverado. The part of the low beam (9006) bulbs that stuck out the back of the headlight housing was much too large. These bulbs are really close to too large, but will just barely fit. They appear to be very well-made, and compared to the standard halogen bulbs, are both bright and clear. They throw out a very consistent light pattern, even in my truck's stock light housings. It remains to be seen how well they last, but so far, so good.

Great forthe price