HuffDad70

@CamGTP you are correct. The site I was using kept moving the OEM tire around. checked the sticker on the door last night and it agrees with that. Trying to fit a 33" tire.

Been trying to find the answer here, but its not easy to find. I am getting new tires for my stock 2019 AT4. Currently have 265/60/R18's with stock offset (+24 per online). I am trying to use Wheel-Size to figure out where to start landing on tire size to fill out the wheel well, but not need to get anything trimmed or add on any lifts/levels. I like the Falken A/T4W tires. has anyone used this tire on their AT4 that can share what they did? I'd like to go with 32.5" tires, which would be LT275/65/R18's but could also go to LT285/65/R18. The LT285/65/R18's though have a rim width of 8-10. The AT4 looks like it has a rim range of 7.5-9.5, but can't really verify this. Below is what I am seeing, assume I would have to get the speedometer recalibrated at the same time as the RPM's are changing.

So far the fix to mine has not resulted in any more error codes or the CEL coming on. Though I am following their recommendation when parking anywhere that looks like its remotely sloped. I have been putting it in park, taking foot of brake, letting it come to a stop, and giving it a second before turning it off so it realizes its not moving. I haven't actually TRIED not following the guideline, mainly as I don't want the CEL coming back on and having that pop up. But I am keeping an eye on it and following this thread, so will update if anything changes.

Follow Up: got my truck back today. Dealer found the error codes P25A2, U0140, U0131, U0151, and U0146. They said that bulletin #PIT5735B was found, matched the codes, and as previously stated here its the brake module sensing movement after the truck is turned off. They adjusted calibration of BSCM to compensate, but engineering is still looking into it. My driveway is on a slope, so just make sure that I apply the parking brake prior to taking my foot off the brake, and do all this before turning the truck off.

Following this. Had the same codes pop up on my truck, 2200 miles on it. My wife mentioned that last week when she drove it the brakes seemed to give out once and that all traction control was lost for a brief minute. It was raining fairly hard that day and we just chalked it up to slick pavement as no error codes got thrown at the time. Maybe it was a prelude to this. Heading to the shop on Friday to get it looked at, but hearing what is in here and the other thread doesn't have me feeling hopeful. OnStar did note that the battery may drain, which i see other mentioning. I did monitor the amps as I was driving (safely) and noticed that they jumped anywhere between 9 amps and 14 amps, mainly siting around 12.5 amps though. We cranked the A/C all the way up, had the radio on, turned on headlights/bedlights/fog lights/towing lights and didn't notice a huge draw. Maybe a 0.25-0.5 amp drop with it all running. The drop to 9 amps was random and was when I was idling at a stop light with nothing else running.

does anyone know why there is a missing sound when you unlock your truck after its been sitting all night or for extended periods?

@akawally how does it seal to the multi-pro tailgate? May be the angle of the photo, but it looks like its not on there very much to seal up?

@Supercup I thought the CarbonPro AT4's had black carbon fiber looking badges and the black GMC badge in the grill? The wheels look great BTW.

First time posting here. Just got a 2019 AT4 and looking for a tonneau. Lots of good convo going on here. Has anyone with the short bed put on a tri-fold that allows you to use the camera in the brake light? My only gripe with tri-folds is that you lose all rear visibility and being able to have the camera would be great.