NHTSA Complaint #11583256 — 2017 CHEVROLET VOLT

My 2017 Chevy Volt has been making a clicking noise coming from the brake booster assembly since I have bought it. When your foot is released from the brake pedal, there is an audible click (3-4 times a second) inside of the cabin and I've decided to make a formal complaint as GM isn't taking the appropriate action to fix this issue. My reasoning is that this issue is not only common on the Chevy Volt, but also the Chevy Bolt as they share the exact same brake booster. For the Volt, dealers are instructed to replace the Brake Pedal Retainer - GM (39081933) and the Brake Master Cylinder - GM (84006919). This repair is often quoted in excess of $2,000 even though there is a very high likelihood of the issue returning even when the parts are replaced. For the Chevy Bolt, dealers were instructed to stop replacing the brake booster as they determined there was a software fix that could solve the issue. There was a TSB regarding this which details both the problem and the repair procedure (# [XXX]) [XXX] While GM fixed this issue on the Bolts, the Volts have the exact same issue and owners are being directed to spend $2,000+ to make a repair that won't even fix the issue. GM needs to release the software fix for the Volts so that the issue can be resolved properly. This burdens current Volt owners improperly, as GM has proven that a software release can fix this but has thus far refused to address and implement it. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)