J2Jones

Neat idea. I'm assuming you 3D printed them. What type of material did you print them in? Are you willing to share the STL's?

I have the Borla S-Type and love it! I get many compliments and have people ask me about it all the time. No drone on the highway and isn't really noticeable unless you are "on-it" or listening for it. No regrets.

Just to let you know, I used Armor Shield and got about 4 years out of it before I reapplied and it was still beading well and looking very glossy. Always get comments that my truck looks "brand new". Saw the same on both vehicles. I will say, my cars are always garaged so that would obviously help.

I'll be interested hear if you notice any changes in how your auto start/stop behaves.

Interesting. When I installed my AMP steps only needed the OBD port and power from the battery. I'll be interested to hear if you notice any other effects. I believe, since installing mine with the OBD plugged in, my start/stop function has been disabled. Haven't unplugged them to check though.

It looks like Zaino is still around. Just haven't used them since moving away from black vehicles. It was an unbelievable finish, like a mirror, the depth was amazing, but a lot of effort and didn't seem to last as long as ceramics. https://www.zainostore.com/

I've debated asking about this. I live in North Carolina so fairly mild weather but I definitely notice lower MPG on cold days. It seems to be much more pronounced in this truck than other vehicles I've owned. I see 1.5-2.0 MPG less anytime the temps get into the low 40's F or below.

I can't speak to any of the ones in their list but when I researched back in 2019 when I got my Truck, I found Armor Shield and applied two coats and have been very happy. Recoated for the first time last summer so got about 4 years out of it and get comments all the time on how my truck looks brand new. Prior I had black cars and used Zaino products and their 5-6 step process. This was much less effort. https://avalonking.com/products/armor-shield-ix-diy-kit

Just a wild guess, any of you folks having this issue have Alexa or Google voice features enabled on your vehicles? If so, I'd assume the mike is listening all the time. Might be a side effect?

I'm running 35x11.50 Ridge Grapplers. I run them at 37 psi as I've noted that with sustained highway driving, they really heat up and generally end up around 40-41 PSI.

Turn signals in the 2019 are a separate array of LED's. The DRL's were three LED's, all white from the factory, and a "light tube" with a diffuser. I guess in theory, if you argue that White is all colors at full intensity, a white LED should be able to be made Amber by changing color intensity but I'm not an electrical engineer so I don't really know. It's definitely not easily reversable or inexpensive as I would probably just have to buy replacement headlight assemblies. As I said, I don't think I'd do it again.

Please do tell, this has got to be interesting.

Maybe easier to do in a 2022. In my 2019 AT4, with the LED modules, I used the following to be able to change mine to amber (actually can select many colors). They work fine, although I wish they were a tad brighter in daylight, but a pain to install. Have to "bake" open the headlight units and replace the factory white leds to install. Not a simple process. Will be interested to see what methods you find. https://www.oraclelights.com/products/2019-2020-gmc-sierra-oracle-colorshift-rgb-w-headlight-drl-upgrade?rq=mk_gmc~md_sierra~yr_2019&variant=31764823146593

I have a 2019 AT4 with 20" wheels running 35x11.50 Ridge Grapplers without any other suspension mods. Had to tie the fender liner on the driver side front back a little with a zip tie because there was some very slight rubbing at full lock. No other changes needed.

Thanks for the suggestion, hadn't thought of that and will certainly do that if the light comes back on. I have a code scanner on the way and an appointment with the dealer on Monday.