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1997 gmc K1500 5.7L 4wd
Anti-lock dash light keeps coming off and on. Anti-lock brakes come on at low speeds even really low a crawl. Just put new rear shoes on last week. Truck or Transmission does not want to shift. Off and on with the shifting but brake pedal is spongy . Sensor maybe? Happened over night no warning. Anyone got any ideas? Thanks