with me it was the o2 censer
Low fuel pressure
In my experience with my Chevy it was a ground wire
have you checked your fuses?
No, warped rotors will cause vibration when braking.
Bad heater core.
Most common cause of that is the rotors are out of round are warped. REPLACE ROTORS.
The 2005 Cavalier could have a fuel leak. Have the entire fuel system checked, as a fuel leak can cause a dangerous fire.
Tire out of balance, bent wheel, or if it vibrates only when braking you have a warped rotor.
There are several things that can cause your 1995 Chevy Cavalier transmission not to go into drive or reverse. The most common cause is a lack of transmission fluid. A broken shifting fork will also cause the problem.
Blown Head Gasket or Bad Cylinder Head