2000 Chevrolet Tahoe wipers, windshield & visibility problems

My rear windshield collapsed into pieces when I opened the cargo door. The shattered glass flew everywhere and resulted in minor cuts scrapes, and not to mention incontrollable tears on my 6-yr old daughter and myself. The service dept. Employee stated several vehicles have gone for the same reason. My parking brake is inoperable and caused my vehicle not to pass inspection. My co-worker had the same problem just yesterday and it needed all of the cabling replaced.

While lowering driver's power window a snap occured and the window fell to the bottom. I contacted my local repair center. They informed me that it was a dealer only item. That the entire regulator assembly would have to be replaced. I spoke to the dealership and they informed me they had gone through hundreds! I veiwed the broken item and the steel cable seemed to be a design flaw, allowing water to settle at cable entrance. Why replace the entire regulator $235.91?