2007 Pontiac G6 Q&A

2007 Pontiac G6 Question: just had catilac converter changed it was pluged up now it is shifting hard help

Answer 1
Could it be due to more power from the engine, now that it can exhale? -
Answer 2
IT COULD TAKE AWHILE FOR MODULES TO READ THE NEW ARE FLOW,IF THE CATT WAS PLUGGED FOR A LONG TIME -