I have a C7 automatic with a Procharger that was tuned about 6 months ago. The owner called me today saying that as he was driving, the car revved up like he was in neutral. He was able to limp the car home and he pulled a P0324 (knock sensor performance). He cleared the code and took the car around the block and the same issue happened.

Can the symptoms he is feeling be attributed to the knock sensors? I've never heard of an issue like this before.