My Mods so Far 2500

Viking Truck · Jul 9, 2025

Ive been very very happy with my chrome emblems coated in plastic-dip. It's been over a year in the sun and holding up great. The black matches color and texture of the black trim. Very easy to apply.

Clarkely · Jul 11, 2025

Got some cheap Amazon stake pocket fillers.... Look good, see if they stay in or not, as they are just compression fit.

Viking Truck · Jul 11, 2025

Clarkely said:
Got some cheap Amazon stake pocket fillers.... Look good, see if they stay in or not, as they are just compression fit.

I like those a lot. I do use the pockets for a hand hold though.

Yamaha862 · Sep 23, 2025

Clarkely said:
Boost Auto sequential signal and running lights, got the driver side installed tonight, hopefully the passenger side tomorrow night

I purchased the GM painted fender flares and smoke running lights for my 25 AT4 HD…how hard was it to remove and replace the fender flares? I’m just curious I don’t wanna scratch my paint up, and yours looks really good!

Johnv76 · Sep 23, 2025

Yamaha862 said:
I purchased the GM painted fender flares and smoke running lights for my 25 AT4 HD…how hard was it to remove and replace the fender flares? I’m just curious I don’t wanna scratch my paint up, and yours looks really good!

To remove the front fender flares on a 2025 GMC Sierra AT4, you must first remove the wheel liner by undoing the star bit screws and prying it out to access the flare. Then, pinch the clips from the back of the flare while gently prying the flare itself off from the outside. The fender flare is held on by several star bit screws, and there are white clips that may get stuck in the slots when reinstallation occurs.

24Titanium3500 · Sep 23, 2025

Yamaha862 said:
I purchased the GM painted fender flares and smoke running lights for my 25 AT4 HD…how hard was it to remove and replace the fender flares? I’m just curious I don’t wanna scratch my paint up, and yours looks really good!

It's easy, but feels like you're breaking your truck. You'll probably (definitely) break some clips. Just purchase some ahead of time from Amazon. If you don't have trim tools, get a set.

Remove fender liners then start pulling!

Clips - https://www.amazon.com/dp/B0D4D8X22W?tag=at4forum-20
Trim removal tools - https://www.amazon.com/dp/B07PFSBXMW?tag=at4forum-20

Clarkely · Sep 24, 2025

Fender flare comes off 1st
Not to bad to do after the 1st one.... First one, you swear you are gonna damage fender or scratch and break them.

Trim removal tool, like listed above is also available from auto parts store. Then some common sense of tape on tools or a rag for where tool will get leverage off of the truck fender.....start at bottom and work up .... Once you get the hang of it it will go easy for the rest.

Lights unscrew from inside

Then a matter of routing the wires.

Boost Auto has good video and print instructions online for the process

Yamaha862 · Oct 8, 2025

Clarkely said:
Got the new order the last week of March.
Added the black Duramax/flag hood emblem badging.
pro clip phone holder onto the A Tach phone mount above display(hid charging wire in behind screen and dash).
Added the Amp Power vision steps.
Added boost auto sequential smoked amber fender lights w/start up sequence.
Added Boost Auto smoked sequential mirror lights/markers w/startup sequence
Added Boost Auto all light on, fog light on with high beams
Added the AT4 puddle lights.
Added the Venom DRL for the amber front LED running lights

Probably all I will do as the truck looks pretty damn good as is, but who knows lol

Cheap Amazon stake pocket fillers added

Looks great ! I just got my amber sequential mirror lights in as well, how easy or difficult was install? I have the AT4 puddle lights too so can’t wait to get mirror lights in I’ve got the amber DRL , truck looks awesome man!

Clarkely · Oct 8, 2025

Yamaha862 said:
Looks great ! I just got my amber sequential mirror lights in as well, how easy or difficult was install? I have the AT4 puddle lights too so can’t wait to get mirror lights in I’ve got the amber DRL , truck looks awesome man!

in my opinion the mirror lights are super easy to install - regardless of which ones you got, Boost Auto has a good install video - watch it once and its easy peasy..

fender lights aren't difficult either as long as you get the tolls for popping of wheel well trim and start at the bottom - again boost has a good video for that as well - biggest PIA on the fender lights is routing the wires against the coated frame - but really not difficult, just a little bit of work.

Yamaha862 · Nov 6, 2025

Clarkely said:
Installed the AT4 puddle lights and they look great and fit perfect on a HD.

Just installed the Boost Auto smoked tow mirror lights in the variant of smoked lens, signal & sequential running light, with spotlight, start up sequence.

A breeze to install 20/25 minute install for them both. Video instructions are good with one exception. The mirror shroud has two plastic connectors at the bottom that aren't described in instructions......they felt like they were going to snap/break but some wiggling and prying got them loose.

I did mine as well and I swear my mirrors move slightly seems while driving …any issues getting the mirror back on? Tips?

Clarkely · Nov 6, 2025

Yamaha862 said:
I did mine as well and I swear my mirrors move slightly seems while driving …any issues getting the mirror back on? Tips?

i did not have any issues - if i recall correctly there are 3 or 4 retainer clips when you snap the mirror back in. My only guess would be that one may have broken when you removed and/or reinstalled the mirror if your seeing movement, or could have bent (they are plastic). I would pop the mirror out and inspect and if all good resnap the mirror back in.