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 K1500, 5.3 ZREPAIR AND DIAGNOSIS (SINGLE PAGE)BRAKESANTILOCK BRAKE SYSTEM WITH TRACTION CONTROL SYSTEM & STABILITY CONTROL SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURESBRAKE PRESSURE MODULATOR VALVE HYDRAULIC TESTINGDUMP AND ISOLATION VALVE TESTING
2006 Chevrolet Suburban K1500, 5.3 Z
Dump and Isolation Valve Testing
2006 Chevrolet Suburban K1500, 5.3 ZSECTION Dump and Isolation Valve Testing
Pressure Dump Test Procedure
- Apply the parking brake fully.
- Start the engine and allow the engine to idle.
- Select the desired Dump Valve Solenoid Test on the scan tool.
- Apply the brake and maintain steady pressure on the brake pedal.
- Command the solenoid On and verify that the brake pedal drops to the floor.
Wheel Isolation Test Procedure
- Apply the parking brake fully.
- Start the engine and allow the engine to idle.
- Select the desired Isolation Valve Solenoid Test on the scan tool.
- Apply the brake with very light pressure, only enough to open the brake switch.
- Command the solenoid On and then immediately apply firm and steady pressure to the brake pedal.
- The EBCM automatically de-energizes the solenoid after about 5 seconds. When this occurs, verify that the brake pedal drops about 2.2 cm (1 inch).
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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.