Everest

I am also having the same issues periodically. I can’t seem to find the problem. I live in south so no issues of corrosion etc. but I did find a guy that fixed the similar problem which was a bad ground cable that had corroded/separated behind passenger side front wheel well/ floor board area. I checked mine and it’s good. I’ve also visually checked all the other areas and see no issues. I basically just clear the codes and it’s good for a little while. Next time yours does it notice the voltage gauge. Mine will spike well past the 14 mark and stay until I cut the engine off. But everything that you are describing is what happens with my truck I can be driving normal and everything is fine and all of a sudden all of the service lights will come on for parking brake, steering four-wheel-drive, etc. and then the AC stops blowing cold air which means the compressor clutch will not engage because of a voltage problem, I have heard so many stories of people taking their vehicle to the dealership just to have parts thrown at it when really, the issue are possibly in the wiring. This seems to be a common problem on these vehicles, and I wish there was a certified mechanic who could shed more light on this because taking to a dealer and having thousands of dollars spent on parts that are not needed because the root of the problem is being looked over it’s not fun I also thought the battery may need be changed or I may need a new alternator, but I have no issues with cranking the truck like you would have with a bad battery or alternator that is not charging I am very confused about the ground because there are so many areas to check because you have the in-line fuses on the battery post that could be an issue. You have ground cables that run from the negative post down to the firewall, another ground from the engine block to the firewall also a ground under the passenger side floor board wheel well area. Also, there is a possibility of a ground at the starter and heat shield as well as a few more places. I will post a pic of my dash and also the bulletin. I found online that may help. If you come up with a solution, please share . Good luck

Truck has 70k miles and lift has been on it for 10k and so far no issues.

Awesome thanks for sharing the info. mine sits at 41” front and rear. I like the look of a 12.50 but didn’t want to do any trimming. So far it’s a perfect balance for me.

Thanks for the compliment Your truck setup looks tough. I like the wheel/tire choice too. What size tires you running? Also how clean do the red calipers stay? Was thinking of doing the same thing as well as doing the red row hooks

I just finished doing this to my 2020 Sierra x31 just remember the angles you see with the truck sitting still may not be the angles that are troublesome. It is when the front of the vehicle travels up llike when going over a bridge and the suspension travels up and down or bounces, and if the bounces are too violent the suspension will max the angles out as the front end of the truck travels up in the air, causing possibly a fracture in the ball joint With that being said, I would like to point you in the direction of american trucks.com. That is where I found a great deal on a set of upper control arms. They have a lot of open box products sometimes at half the cost I was able to find a set of FAbtech upper control arms that normally were 300 and something dollars and I was able to get them taxes shipped and all for 136 so I jumped on it. I also upgraded the shocks all the way around with the Billstein 5100 adjustable shocks truck rides so much better with those shocks and also gives you the option to add up to 2 1/2 inches of lift to the front. So what I did was chose option for 2 1/2 inch lift, and I and paired that with the 2 inch upper strut spacer leveling kit that I had already put on the truck so now I am sitting at roughly 4 to 4 1/2 inches and the angles on my upper control arms look great everything aligned perfectly then added a 1 1/2 inch block in the back. As far as the tire size I went with the 35x11. 50x 20 and have no rubbing but when I put the half inch spacers to push the tires out a bit I did get just a small amount of rub at 90-100 percent turn. I will post pictures to give you an idea of my set up. Good luck on yours. Just wanted to share some helpful information.