I've been having some starting problems w/ my 00 SS. Bypassed the VATS key & even changed out my BCM (no fuel pump signal). I'm getting random no starts ~ just cranks (I have fuel pressure). Checking my BCM diagnostics I'm getting codes (12) 25 & 31 & 35 then (55). Anyone ever mess w/ these? Any advice?

 

31 is history of Courtesy Lamps Feed (Circuit Shorted to Ground) , so I would start there. You'll probably need some wiring diagrams.

 

Thanx Rob ~ I'm getting the Service Manual out now ~ I think that I'm going to be learning more about the BCM than I ever cared to................