OEM Chevrolet Express 3500 Brake Proportioning Valve

Chevrolet Express 3500 Brake Proportioning Valve Parts Questions & Experts Answers

• Pressure Metering Valve
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  Q: How to replace the rear brake proportioning valve on Chevrolet Express 3500?

  A: Take note of the identification code on the valve to find a suitable replacement. Raise the vehicle on jack stands before supporting it. Disconnect the shield retaining bolts before removing the shield. Detach the 2-way electric plug from the combination valve and disconnect both Brake Lines from the valve. Use allen tools to undo the combination valve attachment points to the bpmv and lift out the combination valve. Set the new transfer tubes in place within the valve before connecting the combo valve to the bpmv unit. Again position the combination valve against the bpmv after installing the allen bolts at 8 nm first and 16 nm next to finish the connection. Install the brake pipes into the combination valve with finger-tip force of 30 nm before reuniting the electrical system. Fit the shield back in place and secure it using bolts while tightening them to 12 nm (8 ft. Lbs.). After bleeding you must keep the metering rod of the combination valve pressed down. Then perform the standard brake hydraulic bleeding steps.