I had my LLY in last week said code was injector #1 bad. Turned out to be bad wire . Stealer said it was corrosion, but it was right where wire rubs against bracket. Charged me $ 180 for about 1' of electrical tape and 2" of plastic to placed between wire and bracket. GM doesn't have a quality problem they have a DEALER PROBLEM.
They wont replace all the injectors they will replace the bad ones. I had 4 replaced last week and i tryed to get all 8 but they have to take snap shots of the bad injectors and send the shot to TAC to get the injectors. I even worked at the dealer so i had a little pull but only got 4.
My dealer identified 1 bad injector, but changed out all 8 for me. I think it depends on the dealer and what kind of pull they have. Some will go the extra mile, some won't. There are some service advisors that understand what we go through, but most are just a-holes and don't care. Good luck.
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