I recently bought a 2006 CTS, after 3 days the theftlock came on along with traction control light once the theftlock comes on, I can't rolled my windows down, the radio powers off and I can't take the key out of the ignition until after several attempts then the I can remove the key. The dealer replaced the ecm and 2 days after getting it out of the shop and spending $3000 the problem begun again. I took it back and they don't have a clue. Its been in the shop for 2 days now. Any suggestions?