pontiac grand prix gt 2003

pontiac grand prix gt 2003, suddenly would not
start, has lights when u turn key with a click but no
turn over, good battery. searched the memus and
have seen suggestions from starter issues to  
security issues (being common with the pontiac
grand prix gt if you had those features installed
from the factory) to key issues and how that
operates within the column, besides a dead battery
or corroded cables? is this security issue really that
common in having an effect on the involved
module or fuse? or is it more likely a starter if your
battery is good and you have not gotten it to start
after tapping on the unit?