How Does The Demco SBS Work On A Vehicle With An Electric Master Cylinders Without Vacuum Assistance

Updated 11/08/2021 | Published 11/06/2021

Question:

I have new 2021 chevy silverado with electric master cyl how does this work with out vacuum assistance

asked by: Bill S

Expert Reply:

I contacted the manufacturer in regards to the Demco SBS Air Force One # SM99243, and they explained that the reason they tap into the vacuum system of a vacuum brake booster is that their system creates vacuum and they can keep the power brake booster active during tow. If your vehicle does not have a vacuum brake booster they make adjustments with the operating unit, for hydro boost systems they block off the vacuum port and the exhaust port of the unit. For electric assist units, it depends on what the manufacture of the vehicle is doing with the battery connection, and this is addressed in the manual.

expert reply by: Bryce D