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 MANUALSCHEVROLET2006SUBURBAN C1500, 5.3 ZREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 174 (DISC BRAKE SYSTEM)COMPONENT TESTSPROPORTIONING VALVE
2006 Chevrolet Suburban C1500, 5.3 Z
Proportioning Valve
2006 Chevrolet Suburban C1500, 5.3 ZSECTION Proportioning Valve
WARNING: This page is about a different car, the 2004 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
- Connect 2 pressure gauges and adapters to dual proportioning valve. One to input port and other to output port. Bleed brake system. See BLEEDING BRAKE SYSTEM . Depress brake pedal until pressure gauge reads as specified and check output pressure. See PROPORTIONING VALVE PRESSURE SPECIFICATIONS table.
- Depress brake pedal again, applying additional pressure. Recheck output pressure. See PROPORTIONING VALVE PRESSURE SPECIFICATIONS table. If output pressure is not as specified, replace dual proportioning valve.
PROPORTIONING VALVE PRESSURE SPECIFICATIONS
| Application | Inlet Pressure - psi (kg/cm2 ) | Outlet Pressure - psi (kg/cm2 ) |
|---|---|---|
| Master Cylinder Pressure | 725 (51) | 508-537 (35-38) |
| 1450 (102) | 718-762 (50-54) | |
RENDER: 1.0x
NO RELATED
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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.