Because it is
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"
pictures of how to change front signal bulbs on a 2004 grand prix pontiac
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.
underneith the front bumber twist counter clockwise replace bulb
I had this problem on a 94 Bonneville after we had fixed the brakes. After I disconnected the battery and reconnected the light went off and the dinging stopped. Not sure if this was related or just coincidence.
with the hood open stand in front of the engine look toward the backleft it is usually under the intake manifold use a flash light you will see it better
The 2003 Pontiac Bonneville has a gas tank capacity of 18.3 gallons. The low fuel warning light will come on when the gas tank level gets down to 2.3 gallons.