GM Service Manual Online
For 1990-2009 cars only

Notice: Do not run the engine without fluid in the power steering pump reservoir. Doing so could damage the pump bearing and seals. The belt that drives the power steering pump also drives the coolant pump and other components. Do not disconnect the belt and run the engine. A malfunctioning power steering pump and/or system still serves as an idler pulley for the belt. If the pump is allowed to run without fluid in it, the bearings will seize up and cause the coolant pump to stop. This can cause damage to the engine.

If the hydraulic power brake booster system fails due to a loss of fluid, take the following steps before starting the vehicle:

  1. If the failed part is not the power steering pump, route the pressure pipe back to the fluid reservoir.
  2. Make all necessary repairs. Fill and bleed the power steering system. Refer to Power Steering System Bleeding .

When servicing any part of the brake system, verify the drive belt tension and condition.

When servicing any part of the brake system, check the level in the power steering fluid reservoir. Check the fluid level in the reservoir at regular intervals. Add fluid as needed. Refer to Checking and Adding Power Steering Fluid .