Hard steady brake pedal when truck is off when truck is on the pedal can easily be pressed to the floor last year I replaced and flushed rear calipers brakes were fine let sit for the summer went to drive it again in the fall had practically no brakes tried flushing brakes didn't seem to help new vacuum booster and master cylinder helped minimally. Rubber hoses seam to not flex and can't find any leaks and not losing fluid
My car has 220000 miles.
My car has an automatic transmission.
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