I bought a 1999 Chevy Silverado 4x4, a little body rust, and in decent shape. Runs really good. Bought it mostly for winter driving. Started having brake troubles. Had all of the brakes, rotors, pads, lines were bled, new brake fluid put in, new brake replaced, line put on to the tune of $1000. Truck ran great, stopped good until last week where the brake pedal went to the floor. The truck stopped. This problem is intermittent, seems to happen at random. I can pump the brake and the truck still stops. Went to another brake specialist and said it is probably the hydro vac, or could be bad brake fluid in the brake cylinder, or just a bad brake cylinder. Looking at more big money here again. Truck stops ok after one tap on the brake. Can someone...anyone tell me what is going on with this and what I can expect? Should not a pressure bleed for $100 have been done already? Air in cylinder? Any advice or ideas would be helpful. Great truck, restoring the body too but not until I get this brake situation resolved. Thanks!

 

Sounds like an issue with the master cylinder, is there any warrenty on this?

 

If it's intermittent would not think it's an air issue; sounds more like a master cylinder - don't see that in your above list

 

No. It is unfortunately under warranty. Could be an air issue. Not certain.

 

Thank you for responding. It is appreciated. Will have this checked out. It has to be something. Too good of a truck to get rid of!

 

Thank you again. No warranty. Master cylinder more than likely. Will have it checked and let all know. Mystery yet to be solved.

 

Follow up - replaced all seals, new brake lines, moving on to master cylinder. Problem seems to have been resolved. Thank you to all for the advice!

 

if the problem re-occurs... and it only happens at slow speeds...note if the abs pump is activating

 

Needed to say thank you. Looks like that ABS was the issue. Problem seems resolved at this point.