car sometimes starts on 1997 Pontiac Bonneville

my car mostly starts but sometimes i try to start it and nothing like there is no battery in it at all. but battery is fine fuses are fine.

1 answer
These types of problems are difficult to diagnose because the intermittent nature. I would get the diagnostic trouble codes checked and see if there are any that can shed some light on this. Check the battery terminals are clean and tight.
This may also be related to the security system, are there any lights flashing? See this article for more about this system: http://repairpal.com/gm-passlock-security-light-issues