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.