1998 Pontiac Transport

Brakes problem
1998 Pontiac Transport 6 cyl Front Wheel Drive Automatic 170000 miles

hi my name is gene I manage a fleet of vans and 1 of the vans is a 98 pont transport with a po440 code evap system small leake it also has no brake peadel and is showing all the signs of a bad master cylender could an evap leake have any thing too do with the master cylender not doing its job?
February 20, 2008.

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