I would have hoped they would mention that need to anybody buying the Efan kit, but you might be right. A tune remains the single best bang for the buck mod you can do to unlock the potential that you paid for and GM failed to deliver.gmac310 said:It sounds like he just bought the e-fan kit and not the PCM tune to go with it.
rmsg0040 said:Clearly stated on their site, when you buy the fan kit, it will throw codes and they can remove it if you send it in for a tune.