Preliminary Checks
WARNING: This page does not describe the selected car, but rather 35 other vehicles, including the 1999 GMC Yukon, 1999 GMC Suburban, 1999 GMC Sierra, 1999 GMC Savana Special, and 1999 GMC Savana Camper Special. However, it is still accessible from the selected car via links, so may be relevant.
Check engine idle speed. Check all power steering hoses and brake lines for leaks or restrictions. Fill master cylinder with brake fluid. Fill power steering pump reservoir with power steering fluid. Check for air in power steering fluid reservoir. Check power steering belt tension and condition. Check power steering pump pressure.