2003 Pontiac Aztec

2003 ponitac aztec..key wont turn all the way back to take it out, just enough to shut off car…googled problem its either they key barrel is bad or its the ignition switch..i have a chip in the key(pass key lll)…can i put a uncoded ignition switch in and a new barrel or is the transponder some wheres else in the car to where i have to put in the original equipment