RepairPal Certified shops can diagnose and repair your 1991 Chevrolet Blazer. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
They'll probably want about 1 hour labor, $100 for the hose and $10 for fluid. Replacing the hose requires unscrewing the fitting on the pump and on the steering box and then screwing both ends of the new hose into place.