brake question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

70Custom10Nut · 02-03-2010, 10:49 PM

OK, I've replaced everything(power drums all around). shoes, cylinders, and even the booster. The only thing I didn't replace yet is the master cylinder. My problem is that even with all the air bled out the brake pedal sinks to the floor while I sit at a traffic light. Would a bad MC cause this? The system doesn't leak anywhere. The truck stop well, but as I sit at an idle the pedal sinks to the floor. Can anyone enlighten me? thanks, Cnut

02-03-2010, 10:49 PM	#1
70Custom10Nut Registered User Join Date: Sep 2007 Location: Vilseck Germany (currently) Posts: 317	brake question OK, I've replaced everything(power drums all around). shoes, cylinders, and even the booster. The only thing I didn't replace yet is the master cylinder. My problem is that even with all the air bled out the brake pedal sinks to the floor while I sit at a traffic light. Would a bad MC cause this? The system doesn't leak anywhere. The truck stop well, but as I sit at an idle the pedal sinks to the floor. Can anyone enlighten me? thanks, Cnut



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