Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCADILLAC2006STS AWD V8-4.6L VIN AREPAIR AND DIAGNOSISBRAKES AND TRACTION CONTROLHYDRAULIC SYSTEMDESCRIPTION AND OPERATIONBRAKE ASSIST SYSTEM DESCRIPTION AND OPERATION
2006 Cadillac STS AWD V8-4.6L VIN A
Brake Assist System Description and Operation
2006 Cadillac STS AWD V8-4.6L VIN ASECTION Brake Assist System Description and Operation
Brake Assist System Description and Operation
System Component Description
The brake assist system consists of the following:
Brake Pedal
Receives, multiplies and transfers brake system input force from driver.
Brake Pedal Pushrod
Transfers multiplied input force received from brake pedal to brake booster.
Vacuum Brake Booster
Uses source vacuum to decrease effort required by driver when applying brake system input force.
When brake system input force is applied, air at atmospheric pressure is admitted to the rear of both vacuum diaphragms, providing a decrease in brake pedal effort required. When input force is removed, vacuum replaces atmospheric pressure within the booster.
Vacuum Source
Supplies force used by vacuum brake booster to decrease brake pedal effort.
Vacuum Source Delivery System
Enables delivery and retention of source vacuum for vacuum brake booster.
System Operation
Brake system input force is multiplied by the brake pedal and transferred by the pedal pushrod to the hydraulic brake master cylinder. Effort required to apply the brake system is reduced by the vacuum brake booster.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.