Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 989 (POWER STEERING SYSTEM)
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Section 989 (Power Steering System)
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Section 989 (Power Steering System)
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Component Locator
- Schematic and Routing Diagrams
- Diagnostic Information and Procedures
- Diagnostic Starting Point - Power Steering System (w/o Electro-Hydraulic Steering)
- Diagnostic Starting Point - Power Steering System (w/ Electro-Hydraulic Steering)
- Diagnostic System Check - Power Steering System
- Scan Tool Output Controls
- Scan Tool Data List
- Scan Tool Data Definitions
- Diagnostic Trouble Code (DTC) List
- DTC C0277
- DTC C0278
- DTC C0282
- DTC C0283
- DTC C0284
- DTC C0294
- DTC C0448
- DTC C0481
- DTC C0485
- DTC C0511
- DTC C0544
- DTC C0550
- DTC C0564
- DTC C0870
- DTC C0895
- Symptoms - Power Steering System
- Power Steering System Test Procedure
- Power Steering Fluid Leaks
- Rattle, Clunk, or Shudder Noise from the Power Steering System
- Whine or Growl Noise from the Power Steering System
- Steering Effort Hard in One or Both Directions
- Steering Effort Too Easy in One or Both Directions
- Repair Instructions
- Brake Pedal Position Sensor Replacement
- Bleeding the Power Steering System
- Checking and Adding Power Steering Fluid (Without Hydroboost)
- Checking and Adding Power Steering Fluid (With Hydroboost)
- Flushing the Power Steering System
- Power Steering Pulley Replacement
- Power Steering Pump Replacement (4.3L)
- Power Steering Pump Replacement (4.8L, 5.3L and 6.0L)
- Power Steering Pump Replacement (8.1L)
- Power Steering Pump Replacement (6.6L Diesel)
- Power Steering Pump Replacement (Parallel Hybrid Truck)
- Power Steering Pump Bracket Replacement
- Power Steering Pump Wiring Harness Replacement
- Power Steering Reservoir Replacement - Off Vehicle
- Power Steering Pump Flow Control Valve Replacement - Off Vehicle (Regular)
- Power Steering Pump Flow Control Valve Actuator Replacement - On Vehicle
- Rack and Pinion Outer Tie Rod End Replacement
- Rack and Pinion Inner Tie Rod Replacement
- Rack and Pinion Boot Replacement - On Vehicle
- Power Steering Cooler Pipe/Hose Replacement (Without Hydroboost)
- Power Steering Cooler Pipe/Hose Replacement (Rack and Pinion)
- Power Steering Cooler Pipe/Hose Replacement (With Hydroboost)
- Power Steering Cooler Pipe/Hose Replacement (Parallel Hybrid Truck)
- Power Steering Gear Inlet and Outlet Hose Replacement (Non Rack and Pinion)
- Power Steering Gear Inlet and Outlet Hose Replacement (Rack and Pinion)
- Power Steering Gear Inlet Pipe/Hose Replacement (With Hydroboost)
- Power Steering Gear Inlet Pipe/Hose Replacement (Rack and Pinion)
- Power Steering Gear Inlet Pipe/Hose Replacement (Without Hydroboost)
- Power Steering Gear Outlet Pipe/Hose Replacement (Recirculating Ball)
- Power Steering Gear Outlet Pipe/Hose Replacement (Rack and Pinion)
- Power Brake Booster Inlet Hose Replacement
- Power Brake Booster Outlet Hose Replacement
- Power Steering Gear Replacement (Rack and Pinion)
- Power Steering Gear Replacement (Non Rack and Pinion)
- Rack and Pinion Gear Rack Bearing Preload Adjustment - Off Vehicle (Rack and Pinion)
- Rack and Pinion Boot and Breather Tube Replacement - Off Vehicle
- Tie Rod Replacement - Inner (Quiet Valve)
- Steering Gear Cylinder Pipe Assemblies/O-Ring Seals Replacement - Off Vehicle (Quiet Valve)
- Steering Gear Stub Shaft Seals and Bearing Replacement - Off Vehicle
- Worm Thrust Bearing Preload Adjustment - Off Vehicle
- Pitman Shaft Over-Center Preload Adjustment - Off Vehicle
- Steering Gear Pitman Shaft and Housing Cover Replacement - Off Vehicle (670 Gear)
- Steering Gear Pitman Shaft and Housing Cover Replacement - Off Vehicle (700 Gear)
- Steering Gear Housing End Plug Replacement - Off Vehicle
- Steering Gear Valve Replacement - Off Vehicle (700 Gear)
- Rack Piston and Worm Shaft Replacement - Off Vehicle (700 Gear)
- Pitman Shaft Seals and Bearing Replacement - Off Vehicle (700 Gear)
- Pitman Shaft Seals and Bearing Replacement - Off Vehicle (670 Gear)
- Steering Gear Check Valve Replacement - Off Vehicle
- Stub Shaft Housing Replacement (670 Gear)
- Stub Shaft Housing Replacement (680 Gear)
- Steering Gear Thrust Support Replacement - Off Vehicle
- Description and Operation
- Special Tools and Equipment
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.