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Had exact same problem with my 2004 - same grinding sound. Window regulator cable is made up of several wound stainless "wires." I had several that had broke and were getting hung up on the pulleys. Bought my replacement regulator from 1aauto.com, $73.95, free shipping. Comes with 2 yr warranty. Replaced mine last June. Perfect fit and flawless operation since. I have ordered from them before and have received outstanding customer service.
I was going to start a thread but this seems close... My drivers side window hits a "bump" on the way down. You can hear it and see the glass shift a little.. Same issue?? 99 C5. Windows and seats, windows and seats..lol
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.