Service break booster?
February 16th, 2008, 11:43 PM
#21
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RE: Service break booster?
Doesthat cylinder have a line that runs between the it and the booster? If is does that cylinder may be part of the ABS and the noise your hearing (a vibrating hum)may be the ABS applying itself needlessly. Does the ABS light come on while its make the noise?
February 16th, 2008, 11:56 PM
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RE: Service break booster?
No line between between the two, Thats the wierd thing, i can't figure how the two are related. theres just the wire harness on the top and the vacuum line that runs behind the manifold.
February 17th, 2008, 12:09 AM
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RE: Service break booster?
Is there another vaccum line running to the booster?
Easy way to test, if it is a vaccum line (if not, or not sure then don't try this)then disconnect it and plug the end, run the truck and see if the brakes are stiff. If they are then they are connected, if not (and braking is normal) thenthey are notrelated.
Easy way to test, if it is a vaccum line (if not, or not sure then don't try this)then disconnect it and plug the end, run the truck and see if the brakes are stiff. If they are then they are connected, if not (and braking is normal) thenthey are notrelated.
February 17th, 2008, 12:43 AM
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RE: Service break booster?
06chevy5.3, Yeah, its mounted right there. After checking closer, itIS attached to the booster, behind it theres a small fitting going into the booster with a rubber gasget sealing it. I think northy87 was on to something when he said it was for the abs. Might have to break down and go get a manual tomorrow. northy87, I'm not totally sure that its a vacuum line, I don't what else it would be though.
February 17th, 2008, 12:59 AM
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RE: Service break booster?
Its got to be. Thats where the booster gets it power, and that cylinder is probably what lets up on the brakes so they don't lock up when you slam on them.
February 19th, 2008, 4:33 PM
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RE: Service break booster?
F.Y.I. The part is called a booster auxillary pump. Basically its a a check valve.the wire harness on the topis simply therefor the ecm to moniter the booster.180.00 dealer only part , 20 minute install.Thanks again.
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