Checking and Adding Fluid
WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
For information on checking and adding fluid to the hydraulic booster system, refer to CHECKING & ADDING POWER STEERING FLUID (W/O HYDROBOOST) or CHECKING & ADDING POWER STEERING FLUID (WITH HYDROBOOST) .