Excessive internal pump or steering gear leakage.

Check for internal leakage.

Refer to Power Steering System Test .

The pump pressure is insufficient.

Check power steering pressure.

Refer to Power Steering System Test .

The joints from the column to the steering gear are loose or worn.

1. Check for correct torque.
2. Replace components as needed.

Refer to one of the following procedures:

The steering gear valve is sticking.

1. Flush the steering gear valve system.
2. Bleed the steering gear valve system.
3. Service partial steering gear if symptom persists.

Refer to Steering Gear Replacement .

The fluid is thick. In cold weather the fluid thickens and resists movement through the system.

1. Drain and flush the system if ambient temperatures are -12°C (10°F) or lower.
2. Refill with GM Low Temperature Climate Service Fluid or equivalent.

Refer to Checking and Adding Power Steering Fluid .

The plastic boot on the intermediate shaft is out of position.

1. Inspect the plastic boot on the intermediate shaft.
2. Replace the boot if necessary.

Refer to one of the following procedures: