The start does not activate at all.
The light work just fine since the battery is new.
When I turn the key on, there is no sound at all.
I believe the parking shift switch is working fine since it is opening the door locks.
2000-2001 Pontiac Bonneville
Some customers may comment that the ignition and start switch assembly in the above listed vehicles may not operate properly resulting in an intermittent no start/no crank condition.
This condition may be due to plastic particles interfering with the electrical contacts of the ignition switch assembly.
An improved ignition switch assembly, P/N 25721650, is now available from GMSPO.
Refer to the Instrument Panel, Gauges and Console sub-section of the appropriate Service Manual for replacement procedures.
Did you check the fuse as listed in the link to Silverbullet'* post? You can try the security relearn procedure here http://www.intense-racing.com/sec_relearn.html, but that shouldn't be a problem unless you've replaced some module.