I have a 2005 Pontiac Grand Prix GT that has given me 3 different problem codes and I cannot find the correct manual to fix the issue and cannot locate the parts on the car to know what to replace. Can you please help? The problem codes are P0449, P1125 & P2138. I also believe P1125 & 2138 may be the same issue. Is that right or possible?
Please help : ) & Thank you