One problem related to brake master cylinder has been reported for the 2001 Chevrolet C1500. The most recently reported issues are listed below.
Brakes on my 2001 chevy silverado have never been very good. They have degraded to the point that the vehicle can not reliably stop with reasonable braking distances. Many near accidents have happened and one crash where brakes could have contributed to the accident. The brakes have been serviced with pad replacement, rotors machined/replaced brakes bled, master cylinder replaced and nothing has made the brakes function well. Please note the incident date can be looked up but this is an estimated date reported here.