A scraping or moaning sound may be heard from the supercharger idler pulley on some 2017 CTS-V, Corvette
and 2017-2018 Camaro models equipped with the supercharged 6.2L V8 engine (RPO LT4).

The sound will be most noticeable when the engine is idling.

This condition has the following VIN breakpoints:

Attached Files chart.pngF12-idler-pulley.jpg

Team ZR-1
True Custom Performance Tuning