Sunfire no start

There will be a cam sensor on this engine (though I'm not sure if the one you mentioned is it), but it won't cause a no-spark problem even if it failed. It's possible you may have a bad ignition module..

Actually, it looks like on this engine the ignition module would cause a fuel but no spark condition if it failed. Do you know if the engine is getting any fuel? Try a test light on one of the fuel injector connectors. If you're getting fuel then the PCM should be pulsing the Ignition Control A and B lines to the ignition module (white and orange wires). The ignition module also needs power on the pink wire and ground on the black wire - did you check that the IGN fuse is not blown?

If you've got fuel but no power on the white and orange (Ignition Control A and B), that would probably point to a bad PCM. The service manual gives the following diagnostic steps:

With ignition off, probe with test light between battery positive and each of the white and orange wires.

If light illuminates on either or both, unplug PCM and try again. If it still illuminates on either or both, repair the short in the IC A or B circuit. If not, check the PCM connector, if OK replace the PCM.

If it does not illuminate on either or both, check for an open or short on the IC A or B circuit. If OK, check PCM connector, if OK replace PCM.

The PCM on this car is inside the passenger's side fender. When replaced, it will likely need to be programmed and the crank position variation learn procedure done, so this is probably a dealer-only operation. However, check and see if this is still within the emissions warranty (8 years), as the PCM is covered..