Hello everyone, I’m new to the forum and was looking for some advice. Without success, I’ve also tried to find the answer on my own by searching the forum on my own. I own a 2014 GMC Yukon SLT, RWD, and have already purchased Rancho Quick Lifts along with 1 inch spacers for a 3 inch lift. I have also purchased extended Rancho shocks and coil spring spacers for the rear (to match the front). Question is, do I absolutely need to replace the stock upper control arms? I am unable to find a firm answer either way. Thanks again!