I have a 2000 bonneville that has had issues, the car now will not start it has a new battery, starter, and ignition switch ( went out 3mos ago). the cables have no signs of corrosion any sujestions the interior lights do dim some when starting is attempted

Does it crank?

Does it try to crank?

Is there no noise at all?

Is there a clicking noise and do your lights dim?

These questions help us trouble shoot what'* going on, eventhough you just replaced parts, they still could be malfunctioning..