Wow, I put two 10" RE SX's that were doing around the same numbers in my girlfriends car, a 2008 Toyota Yaris, and not one thing broke. I hate to say it, but that Chevy must be a piece of shit. No wonder the Big Three are out of business
Upol makes a product called "Tiger Seal"...it's a seam sealer that is made to put panels back together in cars...stuff is VERY tough. Get a tube of it, but it's like 35-40 bucks if i remember correctly.