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68gmsee · 04-26-2009, 09:27 AM

Check all of the obvious as woods mentioned but if all looks good then the new master cylinder may be defective.

I went through three of them some years back until I changed parts store and got a different brand. Be sure and follow the directions explicitely on bench bleeding. You can do it mounted on the truck but requires two people.

When you bleed start with the rear passenger side and then the driver's side. Then front passenger side and then driver's side.

04-26-2009, 09:27 AM	#3
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: brake problems Check all of the obvious as woods mentioned but if all looks good then the new master cylinder may be defective. I went through three of them some years back until I changed parts store and got a different brand. Be sure and follow the directions explicitely on bench bleeding. You can do it mounted on the truck but requires two people. When you bleed start with the rear passenger side and then the driver's side. Then front passenger side and then driver's side.