One problem related to brake fluid leak has been reported for the 2001 Chevrolet S10. The most recently reported issues are listed below.
As I was driving I was approaching a four way stop and applied the brakes any the brake pedal went to the floor. The brakes worked fine for the stop before this one. I tried to pump the brakes and the pedal still went to the floor and the vehicle finally started to slow down, I had to down shift to stop in time. I was able to get teh vehcile to a firestone servic estation down the street. They found one of the main brake line shad corrosion and had rusted through and the brake fluid leaked out as I applied the brakes. I was lucky. I had my 2 year old son in the car at the time. I think my years of driving expierence allowed me to avoid a serious collision. There was no warning about the failure of the brake lines. Also the mechaninc noticed serious rusting of the rear disc backing plates, these will also need replacing. So far the cost is about $500. For just the brake lines. The truck has under 60,000 miles. I hardly drive it.