Dalogava

I had the same problem but would not give up as there is no way you should have to change injectors. It took 6 months but finally remedied. I switched to Chevron fuel and used numerous fuel injector cleaners and finally "Gum Out" worked. I don't get anymore codes and everything works fine now. I also had transmission problems as with the engine running rough the transmission kept trying to relearn itself and that has gone away now too. Hopefully this helps someone as GM wanted $2700 to just replace injectors and they couldn't figure out the transmission problem. GM was figuring I needed a new transmission

I had the same problem but would not give up as there is no way you should have to change injectors. It took 6 months but finally remedied. I switched to Chevron fuel and used numerous fuel injector cleaners and finally "Gum Out" worked. I don't get anymore codes and everything works fine now. I also had transmission problems as with the engine running rough the transmission kept trying to relearn itself and that has gone away now too. Hopefully this helps someone as GM wanted $2700 to just replace injectors and they couldn't figure out the transmission problem. GM was figuring I needed a new transmission.