Yes, color matched fenders are a must for me. I ordered some of the lower fender caps (the mud/wind guard replacements without the flap) from truck-accessories and plan on having them painted white for the front and rear to complete the look. Too bad GM doesn't offer this.
No spacers installed nor trimming, only the 2" RC kit and 35x12.5.20s. It does rub at full, full lock but not enough to cause concern or damage. If you are concerned about rubbing, I would recommend 295/60/20s.
The RC kit does not include UCAs. I believe only ReadyLift offers the UCAs with their leveling kit - as you can see from this thread and my posts, stock wheels and 35" tires are too close to the ReadyLift UCA. I know RC can get a bad reputation with their glorified 3"+ leveling kits, but I was pleased with me 2" kit and it leveled my truck perfectly.