Your key is going out. It has a safety feature in it.
Because it is
'How do you change a fog light in a 1996 Pontiac Bonneville? ... How do you
The fuel tank has a large vapor leak.
bad idle and chec engine light comes on. this can be checked with and obd 1 code reader
is your e-brake on?
Have vehicle scanned to determine the problem
"http://wiki.answers.com/Q/I_have_a_1999_pontiac_bonneville_and_the_monitor_light_system_is_on"
Have you checked the computer codes? If so, what do they say?
mine does it all the time, most times i just manually unlock my door meaning by key and this shuts the security light off
Stability system needs service?
Disconnect positive side of battery for at least 5 minutes, worked for my 2002 Pontiac Bonneville. Dealer wanted $50.00 can you say rip-off!
Reset with an OBD2 scan tool, after the repair of whatever triggered the light.