TSBs

Stopping the Chevy Brake Booster Vacuum Leak

Nov. 16, 2022

This bulletin applies to 2015-2021 Chevy Colorado vehicles. The brake booster may have a vacuum leak, possible hiss noise and/or DTC C0299 stored in the ECM. This is possibly caused by the vacuum pump leaking oil into the booster.

Information courtesy of Mitchell 1

Mike Mavrigian

Inspect inside the vacuum hose and booster for a sticky-feeling substance on the rubber. If this is present, this is a likely indication that the vacuum pump is leaking oil. Replace the pump and hose along with the booster if needed.

About the Author

Information courtesy of Mitchell 1

Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.

About the Author

Mike Mavrigian | Motor Age Editor

Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety of specialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.