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3 Attempt to duplicate the condition.Is the In order to accurately diagnose the system, - Go to Step 4 System OK 4 1. Turn the ignition switch to the OFF position. 2. Place a drain pan under the vehicle in order to catch any power steering 3. Disconnect the power steering pressure pipe/hose from the power 4. Install the J 44721 Power Steering System Analyzer. See Special Tools. 5. Fill the power steering system. Refer to Checking and Adding Power Did you complete the installation? - Go to Step 5 - 5 1. Fully open the J 44721 valve. See Special Tools. 2. Start the engine. 3. Turn the steering wheel and BRIEFLY hold the steering wheel NOTE: Refer to STEERING WHEEL IN THE 1525 kPa (221 psi)
2008 Chevrolet Silverado 1500 2008 STEERING Power Steering - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
4. Inspect and ensure that all of the power steering pipe/hose connections 5. Make sure the steering wheel is OFF the steering stop, observe the pressure Is the pressure reading greater than the Go to Step 6 Go to Step 7 6 Locate and repair the restriction.Did you IMPORTANT: A restriction may be present in the power - Go to Step 18 - 7 1. Allow the engine to run until the engine reaches full operating 2. Record the pressure reading and flow reading. 3. Partially close the J 44721 valve until the system pressure reaches the 4. Subtract second flow reading from the first flow reading. Is the flow DECREASE greater than 3.8 L 4827 kPa (700 psi) Go to Step 13 Go to Step 8 8 Fully close then open the J 44721 valve 3 NOTE: Do not leave the valve fully closed for more -
2008 Chevrolet Silverado 1500 2008 STEERING Power Steering - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
steering system pressure relief Go to Step 9 Go to Step 15 9 Are the three high pressure readings within - Go to Step 10 Go to Step 14 10 1. Increase the engine speed to approximately 1,500 RPM. 2. Record the flow reading. Refer to Power Steering Pump Is the actual flow reading within - Go to Step 11 Go to Step 13 11 Is the difference between the actual flow - Go to Step 16 Go to Step 12 12 Turn the steering wheel from steering stop to steering stop and record the FLOW NOTE: Refer to STEERING WHEEL IN THE FULL - Go to Step 18 Go to Step 17 13 Replace the power steering pump. Refer to - Go to Step 18 - 1. Remove the power steering pump flow control valve. Refer to Power 2. Inspect the flow control valve.
2008 Chevrolet Silverado 1500 2008 STEERING Power Steering - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
14 If any burrs or scratches are noticed 3. Inspect the flow control valve bore. If any burrs or scratches are present Did you complete the repair? - Go to Step 18 - 15 Replace the power steering pump flow - Go to Step 18 - 16 1. Remove the power steering pump flow control valve and inspect for any 2. If the flow control valve is worn damaged, replace the flow control Did you complete the repair? - Go to Step 18 - The power steering gear is leaking across
2008 Chevrolet Silverado 1500 2008 STEERING Power Steering - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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