Power brakes problem? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

kynimrod · 08-20-2011, 01:10 PM

I have been struggling with a power brake problem now for a long while, so I thought I might put it out here and see if anyone can help solve it.
1968 C10 50th anniversary edition with power drum brakes. When I first start and drive the truck, the first couple of times I stop I can really feel the power brakes. As I continue to drive it, the brakes get really hard(no more power assist). I replaced the booster and check valve last year and it made no difference. I checked the vacuum and it is 18 and idle and goes up some when rpm increases. I have adjusted, cleaned and checked brakes on all 4 wheels.

What is my problem? The truck came with power brakes!
Anyone shed some light on this?

08-20-2011, 01:10 PM	#1
kynimrod Registered User Join Date: Sep 2009 Location: Louisville KY Posts: 18	Power brakes problem? I have been struggling with a power brake problem now for a long while, so I thought I might put it out here and see if anyone can help solve it. 1968 C10 50th anniversary edition with power drum brakes. When I first start and drive the truck, the first couple of times I stop I can really feel the power brakes. As I continue to drive it, the brakes get really hard(no more power assist). I replaced the booster and check valve last year and it made no difference. I checked the vacuum and it is 18 and idle and goes up some when rpm increases. I have adjusted, cleaned and checked brakes on all 4 wheels. What is my problem? The truck came with power brakes! Anyone shed some light on this?



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