Severe Commercial Use Vehicles Only: Lubricate chassis components every 5 000 km/3,000mi.Have underbody flushing service performed. See "Underbody Maintenance" inExterior Care.
Power Mode Description and Operation
GMLAN and Media Oriented Systems Transport (MOST) Wiring RepairsPower Vacuum Brake Booster Replacement Hydraulic Brakes Brake Booster
Removal ProcedureWarning:Refer toBrake Fluid Irritant Warning.Caution:Refer toBrake Fluid Effects on Paint and Electrical Components Caution.Remove the vacuum brake booster vacuum sensor and hose fromthe vacuum brake booster and position aside. Refer toPower Brake Booster Vacuum Sensor Replacement.R ...