working on a 01 chevy w3500 tiltmaster cube van. intermittently brake pedal goes to floor,booster lamp comes on. brakes good no fluid leaks,has abs no lights. exhaust brake booster pedal hard, start engine slowly pedal fades. when running can pump brake pedal ...

FIX posted 5/6/2010

iATN Members:
Login to view full TechHelp request
Auto Repair Pros:
Join iATN to read this TechHelp request
Vehicle Owners:
Find a nearby iATN member to repair your vehicle