Where is the oil filter located on a 03 chevy cavalier?

The Ecotec engine has a cartridge type filter rather than a turn on type. it is pretty easy to change. it's over the engine block, just under and behind the air intake tube where it goes into the throttle body. Take off the black plastic housing and replace the filter inside. I remove the intake tube for easier access, but you may not have to based on what kind of wrench you use.

I own one.