So I hope I’m asking this question correctly. I have a ‘19 RST with the GM factory 2” lift kit. I’m thinking about getting 275x65x20 tires. I remember when the New Body’s first came out, people who put a 3” lift kit on the front had issues with 4 auto and the stock UCA wasn’t ideal for anything over 2”.
So my question is, by putting on 275x65x20 tires, I’m adding maybe 1/2” to an 1” (I don’t know which for sure. Correct me here)) of additional height. This puts me at possibly 3” of lift in total, 1” coming from bigger tires. Does that mean I should upgrade the UCA? Or because the extra inch of height is coming from tires and not a lift kit on the suspension, I’ll be ok with the stock UCA?