I have a 2002 Chevy Cavalier with power windows... this morning I noticed that the passenger side window will go down but will not go up, so I figured it's not the motor. The driver side window is working normally. Anyone know how I can get the window back up again? Thanks

If the window motor is weak or bad you can usually have someone else pull up on the window (with your hands, do not use any tools to pull the window up) while you press the switch, otherwise if this doesn't work it may be that the switch is bad.

I doesn't go up from either the passenger's switch nor the driver's switch?
Your problem is likely a bad switch. The question is which switch?
You need access to the back of the passenger side switch: check for power with a non-powered test light on the light blue and the tan wires simultaneously while working both switches, one at a time. If one either switch isn't working properly, replace that switch. If both are working properly, replace the window regulator motor.