If you have changed a brake line, brake master cylinder or caliper in your Chevy Silverado, then chances are you have introduced air into the brake system. Air in the brake system causes a mushy brake pedal and an increased braking time that can lead to an accident. The reason for this is because air is compressible while brake fluid isn’t, which makes it a good candidate for transferring energy from one section of the brake system to another. Bleeding the brake fluid will ensure that your Chevy Silverado is safe to drive.
Jack up the Silverado and place it on jack stands.