Anyone have experience with a non-working PSI gauge on a 2012 Shelby GT500? I bought this used with 29K miles and it was never working from Day 1. I thought maybe a Supercharged engine might have something to do with it, but since I am no rocket-scientist obviously, WTF would I know? Anyway, I am under extended warranty so it's not that big a deal having it looked at and fixed for free, but there lies my problem. Seems like everytime I take a car to a dealership, most of the clowns there, have never even seen a car like this, let alone worked on one! So I am afraid to let some yo-yo start tearing my car apart. An you know damn well, they are looking forward to road testing the car so they can beat the shit out of it once, since they never even get to sit in a car lie this usually. What the hell am I gonna do folks?? Help!!!!!