Sierra 1500 2WD V8-5.3L VIN Z Flex Fuel (2006)
Brake Proportioning/Combination Valve: Service and Repair
Combination Valve Replacement
Removal Procedure
Important: Note the identification code on the combination valve. The new valve must have the same identification number as the old valve.
1. Remove the combination valve electrical connector.
2. Remove the front and the rear brake pipes.
3. Remove the combination valve from the vehicle.
Installation Procedure
Important: Verify that the replacement combination valve has the same pin punched identification code as the code on the old combination valve.
1. Install the combination valve to the vehicle.
2. Notice: Refer to Fastener Notice in Service Precautions.
Install the front and the rear brake pipes to the combination valve.
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Tighten the brake pipe nuts to 25 Nm (18 ft. lbs.).
3. Connect the combination valve electrical connector.
4. Important: Verify that the combination valve metering rod is depressed during bleeding.
Bleed the brake system.
