How do you check the automatic transmission level in an alero?

Read your owner's manual. If it does not have a dipstick, then it is a sealed for life transmission. You cannot check the fluid level.

That was an ignor.answer,the right answer is:look under the frontside of the tranny for a plug ,take it out level the car an crank it then put it in neurtal,fill it until it starts coming out of the plug hole,the fill cap is down in the drivers side of the eng.,its red,under the exaust crossover pipe.