cc1999

None, here. Dealer could smell it too, ran all sorts of test on the coolant system. Never set a code, never a sign of a leak anywhere, my coolant was never found to be low in 20,000 miles. Just had that coolant smell. I sold mine to a good friend of mine, when I bought my 23 AT4X which only come with 6.2L gas engines. But I would have bought the diesel again had it been offered in the X .

Swapped out grey Fuel covert rims and 305/60R18 Recons for solid black Fuel coverts and Falken 305/65R18s Tinted the windows as well.

Tires are 305/60R18. Wheel is 18x9+20. ‘That same tire I originally had mounted on a 18x9+1 which I had on my 2021 AT4, which that setup did have a rub issue on the 2021. I ordered today that same 18x9+20 Fuel covert wheel, only in all black with a set of 305/65R18 Falken At3 tires. The 2023 trucks with the AEV front bumper come with a 33.2” tire, the Recons were only 32.4” tall tire. ‘Going to try and keep the 305 width and get the height back up a little over 33”. The Falkens spec 33.4” tall.

New 2023 AT4X Running a 18x9 +20 Fuel Covert Grey center black ring. Tire is a Nitto Recon Grappler LT305/65R18 Load Range C 33 Technically 32.5 “ .

It was dark out when we got the wheels, tires , ruby to black badges swapped out. ‘Here is few pics taken in the garage tonight. This my other GMC .

Got it picked up today. It was found and bought at dealer 2.5 hours away. Still managed to get it home and get a few mods done this evening.

Sold my 2021 AT4 Carbon pro 1500 Duramax tonight, picking up my new 2023 AT4X later this morning . Dealer sent me a few pics yesterday right after it came off the transport.

Got my new HD a week and half ago, so far got the windows tinted, my black gmc logo’s installed, headache rack and toolbox installed. Day 1 hot her home and got started . Getting started. Next came the window tint. Next came getting the rack and tool box off my old 2015 Ram 2500 all moved over and setup on my 2023 GMC HD . Now on the GMC 2500.

I ordered Fuel covert 18x9+20 with Nitto Recon tires 295/70R18 . based on my math calculations. I should end up really flush with my fenders or very close to it. Which is what I am after. Custom Wheel offsets has a great gallery for seeing what different combinations look like. May not find the exact wheel tire combo your wanting but you can find sizes and offsets like;y similar to what your looking for in similar size and offset with similar size tires. https://www.customwheeloffset.com/cart

Recent pic of my 1500 AT4 Duramax doing a little work. Here is one of my new 2023 HD Duramax.

My AT4 now has 10k miles and ever since the first oil change around 7000 miles mine has had the same coolant smell everyone is talking about. I have had other mechanical minded buddies comment on it as well. At first I thought I was imagining it, when I could not find any visible problems. Same as everyone else no codes, no leaks found anywhere, coolant levels have remained the same since I first noticed it about 3000 miles ago.

Those are the OEM boards that come on AT4s, I think they were possibly part of one of the option packages on the truck. You probably could get them from a GMC dealer . I would imagine they are offered as an accessory item from GMC parts.

Here is how it looked before with same oversized tres and wheels only with the black fender flairs.

Added body color wheel opening moldings to my AT4. ‘This was about the only option my AT4 was missing. GMC offers these repainted ready to install for around $600 i think they really clean up the look or lines of the truck. Also helps make your wheels and tires look more proportional to fender openings.

Got them clearanced , no problem. Took about 30 min for each front caliber. Took about half that bulge off. Rides and drives great. I am a happy camper now.