One problem related to brake fluid leak has been reported for the 1998 Chevrolet C/k Pickups. The most recently reported issues are listed below.
I have a 1998 chevy c1500 extended cab p/u. If you hold normal pressure on the brake pedal at a stop sign or light, the pedal holds just fine. But if you push just a little harder, it goes down. I have taken it almost to the floor. There is no brake fluid leaking. It never gets low. I have put a new, not used, master cylinder from autozone on it. It does the same thing. I used to be an auto mechanic at a. K. Durnin Chrysler Plymouth in baton rouge louisiana. I now sell auto parts and I'm telling you, this is not normal. Also, if I hit the brakes kind of hard, and then let off just a little, it makes a noise and an uneven breaking pattern. It's the anti-lock brakes, braking and letting off, repetitively. About like the rhythm of a jack hammer. Oh, I spent 3 1/2 years at the Dodge dealer as a mechanic. I did brakes every week. I was the mechanic that they would bring a car to, when no one else could fix it right!.