IF the ABS warning light is not coming on in the dash(?) .. That is indicative of brake booster failure .. Have auto repair shop check it out ASAP ... Never know when you may need to STOP suddenly!
RepairPal Certified shops can diagnose and repair your 2001 Chevrolet Silverado 1500. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.