Checking and Adding Fluid
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. 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 and Adding Power Steering Fluid (Without Hydroboost) or Checking and Adding Power Steering Fluid (With Hydroboost) .