Two problems related to brake master cylinder have been reported for the 2002 Chevrolet Trailblazer. The most recently reported issues are listed below.
Well serviced 90k miles. Traveling at 35mph pushed breaks all the way down (fracturing right ankle) slowed me down but failed to stop at upcoming red light. Struck medium size vehicle injuring other driver and causing considerable damage to both vehicles. Chevy dealer collision/service center estimated $8k in repairs. In other words it costs more to repair it than what the vehicle is worth. Also:"master cylinder is bad" and air bags did not deploy. Chevy tech. Said "impact was not big enough" . After reading some eight other complaints very similar to this . I am concerned about driving this or getting into another one. Is there not a break light service sensor that I should have noted. ? service manual for scheduled maintenance says to check front and rear axle fluid and add fluid as needed every 5k to 7k miles after 67. 5k miles.
While applying the brake pedal vehicle failed to stop completely. Driver was able to maintain control of the vehicle, and drove it to the dealer for inspection. Mechanic determined that master cylinder needed to be replaced, and replaced it. However, the problem recurred. . . . . . Coming off the road at 20 mph brakes went all the way to the floor another vehicle went to the left lane to prevent consumer's vehicle from hitting him. When bringing vehicle to service center was told there wa snothing wrong with the vehicle. On eof the wheels came off on the highway.