Next up on the list was some new H3 LED taillights.
Picked up these nice looking H3 SUV LED taillights that I will retrofit on to the H3T. For the non-truck H3 guys out there, the standard SUV H3 tailights and the H3T taillights are not the same. They are extremely similar though. Some of the main differences you'll see below, but the wiring is different and the number of bulbs are different. More on that later. But besides that, the H3 taillights taper off at the front-most outside corner. The H3T taillights go straight up and do not taper off. They also have a bit different mounting points and extended plastics. The truck version is low profile at the edges in order not to interfere with the tailgate, and the SUV version has the edges extended out to the screw/mount locations.
Since the truck version is flush on the inner-tailgate side, the mounting locations for the screws are perpendicular to the screw locations for the SUV version. The screws face the sides of the truck not the front.
Here's the T version on the left and the H3 LED version on the right. You can see the truck version can sit flush together on the inside edges, and the SUV versions have the extended plastics...
And here's a look of the bottom of each style. Again, the truck version (H3T) is flush on the bottom versus the extended bottom edge of the SUV (H3) version.
Side view from bottom...
Andddd we begin... Took my Dremel and started cutting the SUV style LED taillight to mimic the flush style truck version. Note the two mounting screw locations being on plastic being cut off.
Same for the bottom...
Also made a short video for a buddy also looking to change over to the aftermarket LED H3 taillights, so I figured it may help out a fellow H3T owner.
Now, as I said in the video, I could have bought a 90 degree piece of plastic for the corner mounts, and epoxied them in. But not finding what I wanted at the hardware store, I decided to take some of the scrap plastic that I cut off beforehand, and Dremel them out to long rectangular strips, that I then put in my oven and baked until the plastic softened up (don't mind me slipping up and pronouncing the T in the video lmao). Once pliable, I bent the plastic around a 2x4 piece of lumber to get the desired corner/90 degree angle shape. When hardened and room temperature again, I cut to length on each location (4 total), and taped down to mock up on and off the truck until I had all four corner pieces perfectly aligned to each location. I then plastic epoxied each corner mount to it's designated spot, then let cure overnight.
Once done, I was left with the corner mount plastic visible in the truck screw holes. Since they were cured the next morning, I took a drill bit and drilled out the holes in the corner plastics (hopefully this all makes sense to a future H3T guy wanting to do this), and took the screw retention clip off of the H3T taillights, and on to the newly drilled holes on the H3 LED tails. Boom, H3 to H3T tails.
Don't pay too much attention to the back of the taillights after Dremeling. They don't look nearly as good when you start to cut schtuff off haha. but the fronts are still perfect.
View of the finished taillight shaved down and epoxied corner mounts.
Now the physical part is done, the wiring part was next. For this, I went to a good buddy of mine who y'all may know as Acer here on the forums and from his Hummer YouTube channel as well. I had been toying around with doing this mod since summer of 2023 and finally bit the bullet and sent Acer a pair of NEW H3T specific taillight harnesses (yes, they are still for sale from dealers), and he modified the new H3T taillight harnesses to adapt to the H3 SUV style taillights with full functionality. This allowed me to simply remove the stock taillight harnesses and plug and play the modified H3T harness to match up with the H3 wiring. So I want to say a big thank you to Acer for this in public, because I pick on him quite a lot in real life lol.
So because the H3T has 3 bulbs with their own circuits in total to control as opposed to the 2 circuits/bulbs in the SUV, I had to go with a switchback bulb for each side. I decided to go with these fancy Headlight Revolution GTR Lighting carbide 2 LED bulbs, which will be able to take on the role of both the turn signals and reverse lights with the new taillight harness wiring. And boy, are these things BRIGHT!!!
The only item is that there is a tiny corner that is missing on the H3 style taillights when installed on the truck. You would have to be looking for it to typically see it. BUT... with the SnugTop on the back, you cannot tell at all. The minimal half inch coverage or so of the topper over the body makes that missing corner not visible. Almost caught up, as you can see in the video, this was around Christmas time of this past year.
I'll have to make a more in-depth video for you guys if you'd like. But this is just a look at the running lights during both the day and at night. Besides the running lights, the reverse lights are bright and the turn signal are REALLY bright. Really loving these on the truck.
. i don't like it. and i bet your is higher on ground clearance too 
I would LOVE if they made a diesel version of it. That would be sick. Deff would be on my Hummer bucket list if so...
