Machining Z06 and/or Z55 Cross Drilled Rotors - keywords brake front grind hub lateral lathe machine noise rear runout thickness turn Z06 Z55

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

GM Technical Assistance has received several questions in reference to machining cross drilled rotors on Z06 and Z55 RPO equipped Corvettes. The questions are ... Can Z06 and/or Z55 rotors be machined? Are there any special machining procedures? and What is the "MIN" machining spec of these rotors. Below are the answers to these questions.

1. Question - Can Cross Drilled Rotors be Machined? Answer - YES
2. Question - Are there special machining instructions compared to conventional rotors? Answer - No, there is no special machining procedure. Follow the procedures in eSI for Corvette under Brake Rotor Refinishing. Also follow all Dealer Equipment instructions.
3. Question - What is the "MIN" thickness of the Z06 and Z55 Rotors? eSI does not specify Z06 or Z55. Answer - The specifications in eSI under Disc Brake Component Specifications, refers to all Corvette brake applications for that model year. The specific RPO codes above will not be called out separately.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.