Article continues below advertisementChevy Chase is opening up about the health problems that nearly killed him in his new authorized CNN documentary.I'm Chevy Chase and You're Not is set to premiere on New Year's Day and features insight into the Saturday Night Live alum's past hospitalization, such as his "near-fatal" heart issues that put him in a coma for eight days as he recovered.Article continues below advertisement'I'm Chevy Chase And You're Not' Drops on January 1Source: CNN/YouTube'I'm Chevy Chase And You're Not' premieres on CNN on January 1.