Most Common cavalier problems

Alright, I have a 2003 cavalier just bought it about a month ago. So far I have replaced the IAT sensor, now my car is stalling so I am about to change the TCC solenoid. What are the most common problems with cavaliers so I know what to keep my eye on? Also how hard is it to replace the tcc switch and where is it located so I can disconnect it until I get the part to replace it?