Yesterday while driving my brakes went out, and the car shut off. Started back up, and drove off hearing a grinding sound coming from the left front wheel. Looked at the disk and noticed a groove at the very top and at the base of the disk . .........I was able to get it home safely with the brakes working, but a gringing sound only from the left front wheel.........i looked at the other disc and found now abnormal grindings.....No indicators are lit up on the dash. Took car to dealer this am.........Should I be very worried. I do have a 7/70 warranty inplace........im at 62,000 miles now. anyone had this problem with the left caliper on the 05 crossfire..........