Brakes go to the floor!!!
Asked by Ian Nov 25, 2018 at 02:31 AM about the 2008 Pontiac Grand Prix Base
Question type: Maintenance & Repair
08' Grand Prix 6 cyl. Brakes go straight to the floor whether
vehicle is on or off. ABS and TRAC lights are on. No visible
fluid leak. Master Cylinder replaced 2 years ago, calipers
last year, rotors and pads and flex line 6 months ago.
Brakes have been bled and rechecked. No air. Master
Cylinder was bled when installed. What's the issue???
4 Answers
The master cylinder is almost always the culprit, replace it carefully so as not to get air in the abs control. I hope this helps
What Mike said. And always buy a NEW master cylinder. Never buy rebuilt master cylinders or A/C compressors. They never last or work correctly out of box. Safety with brake parts.
You might need a bidirectional scanner to activate the ABS pump to get air moving down and out.
firebird338 answered 6 years ago
Check for loose hub / wheel bearings if one or both are loose will cause brake pedal to go to floor.
