What would make my motor fall ony 2000 chevy cavalier? I havent even wrecked it

Four cyl or v6?

This car had a recall on bolts that fall out of the transmission mount on the driverside. Remove airfilter box and you should gain access to it

If bolt holes are ok use loctite blue tighten bolts to 25 foot pounds or just a quarter turn after it starts tightening. Hope that helps.

Do you have any vibrations when starting at idle or while driving> Are there any "thumps" when going over dips or speed bumps? It very well be after 13 years your transmission mounts and motor mounts. I saved 60% by having an independent garage do it on my 2004 Bonneville over the car dealer's estimate. No more vibrations at idle, drives better, and no more "thumps" when driving over little old ladyies pushing grocery carts.