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Old 01-18-2006, 01:49 AM   #1
72 GMC K1500
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Join Date: Mar 2005
Location: Castle Rock, CO
Posts: 24
Question How do you tell if a Brake Combination Valve is Defective?

Can anyone tell me how you can diagnose a combination valve? I have replaced almost ALL of the front and rear brake components on my truck but the brakes are still terrible! I get very little nose dive on the truck when the brakes are applied with a lot of pressure and my only thought was that the metering valve component of the valve may be defective. Any thoughts?
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1972 GMC K1500, sbc 350, turbo 350
Castle Rock, CO

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