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 MANUALSCHEVROLET2005BLAZER 2WD V6-4.3L VIN XREPAIR AND DIAGNOSISBRAKES AND TRACTION CONTROLPARKING BRAKE SYSTEMDESCRIPTION AND OPERATION
2005 Chevrolet Blazer 2WD V6-4.3L VIN X
Parking Brake System: Description and Operation
2005 Chevrolet Blazer 2WD V6-4.3L VIN XSECTION Description and Operation
Park Brake System Description and Operation
System Component Description
The park brake system consists of the following:
Park Brake Pedal Assembly: Receives and transfers park brake system apply input force from driver to park brake cable system.
Park Brake Release Handle Assembly: Releases applied park brake system when pulled.
Park Brake Cables: Transfers input force received from park brake pedal, through park brake cable equalizer, to park brake apply lever.
Park Brake Cable Equalizer: Evenly distributes input force to both the left and right park brake units. Threaded park brake cable equalizers are also used to remove slack in park brake cables.
Park Brake Apply Lever: Multiplies and transfers input force to park brake actuator/adjuster.
Park Brake Actuator/Adjuster: Uses multiplied input force from apply lever to expand park brake shoe (rear disc, drum-in-hat system), or drum brake shoes toward the friction surface of the drum-in-hat of the rear brake rotor, or the brake drum. Threaded park brake actuators/adjusters are also used to control clearance between the park brake shoe (rear disc, drum-in-hat system), or the drum brake shoes and the friction surface of the drum-in-hat (of the rear brake rotor), or the brake drum.
Park Brake Shoe (Rear Disc, Drum-In-Hat System): Applies mechanical output force from park brake actuator to friction surface of the drum-in-hat (of the rear brake rotor).
System Operation
Park brake apply input force is received by the park brake pedal assembly being depressed, transferred and evenly distributed, through the park brake cables and the park brake cable equalizer, to the left and right park brake apply levers. The park brake apply levers multiply and transfer the apply input force to the park brake actuators/adjusters which expand the park brake shoe (rear disc, drum-in-hat system), or the drum brake shoes toward the friction surface of the drum-in-hat (of the rear brake rotor), or the brake drum in order to prevent the rotation of the rear tire and wheel assemblies. The park brake release handle assembly releases an applied park brake system when it is pulled rearward.
System Component Description
The park brake system consists of the following:
Park Brake Pedal Assembly: Receives and transfers park brake system apply input force from driver to park brake cable system.
Park Brake Release Handle Assembly: Releases applied park brake system when pulled.
Park Brake Cables: Transfers input force received from park brake pedal, through park brake cable equalizer, to park brake apply lever.
Park Brake Cable Equalizer: Evenly distributes input force to both the left and right park brake units. Threaded park brake cable equalizers are also used to remove slack in park brake cables.
Park Brake Apply Lever: Multiplies and transfers input force to park brake actuator/adjuster.
Park Brake Actuator/Adjuster: Uses multiplied input force from apply lever to expand park brake shoe (rear disc, drum-in-hat system), or drum brake shoes toward the friction surface of the drum-in-hat of the rear brake rotor, or the brake drum. Threaded park brake actuators/adjusters are also used to control clearance between the park brake shoe (rear disc, drum-in-hat system), or the drum brake shoes and the friction surface of the drum-in-hat (of the rear brake rotor), or the brake drum.
Park Brake Shoe (Rear Disc, Drum-In-Hat System): Applies mechanical output force from park brake actuator to friction surface of the drum-in-hat (of the rear brake rotor).
System Operation
Park brake apply input force is received by the park brake pedal assembly being depressed, transferred and evenly distributed, through the park brake cables and the park brake cable equalizer, to the left and right park brake apply levers. The park brake apply levers multiply and transfer the apply input force to the park brake actuators/adjusters which expand the park brake shoe (rear disc, drum-in-hat system), or the drum brake shoes toward the friction surface of the drum-in-hat (of the rear brake rotor), or the brake drum in order to prevent the rotation of the rear tire and wheel assemblies. The park brake release handle assembly releases an applied park brake system when it is pulled rearward.
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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.