So I noticed my battery voltage gauge reading below 14V while the truck is running. 2020 Sierra AT4 seems like Half the time it reads below 13V, while running. I have verified the voltage with a multimeter. Running idle I was getting 12.6 volts. I know the alternator should be putting out 14.5 ish. does anyone know if there’s some sort of new feature that prevents the alternator from juicing the battery with full voltage?
what was the issue with the Ready Lift kit?
I put on a set of 285/65/20 KO2s and they fit without any rubbing at all. This was before any level or spacers. They just looked too damn skinny. I don’t think the 295 were even an option at discount tire otherwise I would have tried them. Although I think they would end up being too big and probably look skinny the 285/65/20 and the 35x12.5x20 end up being almost the same exact diameter. The later being significantly wider and beefier looking. honestly I love my setup. .375 bora spacers are good to go as they are hub centric and leave plenty of threads left on the studs. You cannot even tell at all that they are sticking out more than the rear tire.
Forgot I had this picture. With OEM arms the 35x12.5x20 KO2 tires did rub at full lock. This was before the leveling kit.
Thank you! will post closeup pics of trim job tomorrow. I did install the Ready Lift UCA with their 1.75” leveling kit. I also installed the .375” bora spacers, which were definitely needed as the new arms moved the ball joint a tiny bit closer to the tire. I was already cutting it close. no rubbing on the arms at all with this setup. two pics below. One with the OEM arms before the level - without spacers. The next pic will show the distance with the level, new arms and .375” spacer. something to take note of. The OEM UCA ball joint has a sharp edge that points towards the tire, so if the tire made contact, it would not be good. The ready lift ball joint is rounded, so if there was minimal contact for whatever reason, I don’t think it would do much. Hard to tell from the pictures but I had like 1/8” of space with the OEM UCA. I think I Have about .375” of space now. I think I would REALL have to get wild to see any rubbing on the ball joint now. Even if it did rub, it’s round like I mentioned earlier and I couldn’t imagine it hurting the tire.
Update 1.75” Ready Lift leveling kit installed. Also has the wheel well trimmed to eliminate rubbing with my 35x12.5x20 KO2s
Awesome thank you! just installed 35x12.5x20 BFG KO2’s on my 2020 AT4. No lift or any other modifications. Rubs on the front mud flap plastic Brackets at half turn to full lock. Nothing that can’t be fixed fairly easily. I’m more concerned with the control arm ball joint. I have maybe 1/8” between the tires and the ball joint. waiting to install the ready lift level with control arms, which apparently places the ball joint about 3/8” closer to the tire. I’m waiting on .375” bora spacers. I’m hoping that will be enough because if I have to jump up to a 1.25” spacer, I’m pretty sure I won’t be able to trim my way out of the situation due to that metal bracket behind the mud flaps Looks amazing - will post pics tomorrow
Have you you installed the 1.25” Bora spacers yet? Did you end up having to trim the lugs?
Which leveling kit do you have? how close are you to rubbing on your ball joint?
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