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 1428 (SUNROOF SYSTEM)
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Section 1428 (Sunroof System)
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Section 1428 (Sunroof System)
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Schematic and Routing Diagrams
- Component Locator
- Diagnostic Information and Procedures
- Diagnostic Starting Point - Roof
- Diagnostic System Check - Power Roof
- Diagnostic System Check - Power Sunroof
- Scan Tool Output Controls
- Scan Tool Data List
- Scan Tool Data Definitions
- Diagnostic Trouble Code (DTC) List
- DTC B1325 and B1335
- DTC B3611, B3612, B3613, B3614, B3615 and B3616
- DTC B3972
- DTC B3973
- Symptoms - Roof
- Power Roof Inoperative
- Power Sunroof Inoperative
- Power Sunroof Does Not Close
- Power Sunroof Window is Skewed
- Power Sunroof When Operated from Vent to Close One Side Will Drop Before the Other
- Power Sunroof When Closing from the Vent Position the Window Will Reverse Direction
- Power Sunroof Will Stop at the Wrong Location
- Power Sunroof Will Over Travel the Open Position and Stall the Motor
- Power Sunroof Will Over Travel the Close Position and Stall the Motor
- Repair Instructions
- Power Roof Relearn
- Sunroof Track Timing/Synchronization
- Sunroof Drain Hose Replacement - Front
- Sunroof Drain Hose Replacement - Rear
- Sunroof Sunshade Panel Replacement
- Sunroof Window Replacement
- Sunroof Window Weatherstrip Replacement
- Sunroof Switch Replacement
- Sunroof Motor/Actuator Replacement (Old Style PEZ)
- Sunroof Motor/Actuator Replacement (New Style MD4)
- Sunroof Motor/Actuator Initilization/Teach Process (New Motor)
- Sunroof Motor/Actuator Initilization/Teach Process (Existing Motor)
- Sunroof Module Assembly Replacement (Old Style PEZ)
- Sunroof Module Assembly Replacement (New Style MD4)
- Moveable Roof Panel Frame Replacement
- Moveable Roof Panel Spring Wedge Replacement - Front
- Moveable Roof Panel Locator Replacement - Rear
- Moveable Roof Panel Guide Replacement
- Moveable Roof Panel Guide Bracket Replacement
- Moveable Roof Panel Latch Replacement - Front
- Moveable Roof Panel Latch Replacement - Rear
- Moveable Roof Panel Latch Spring Replacement - Rear
- Moveable Roof Panel Lock Pin Replacement
- Moveable Roof Panel Air Deflector Replacement - Front
- Moveable Roof Panel Motor/Actuator Replacement
- Moveable Roof Panel Control Module Replacement
- Moveable Roof Panel Wiring Harness Replacement
- Moveable Roof Panel Actuator Cover Replacement
- Moveable Roof Panel Seal Replacement - Rear Header
- Moveable Roof Panel Seal Replacement
- Moveable Roof Trim Panel Seal Replacement
- Moveable Roof Panel Assembly Replacement
- Moveable Roof Panel Bushing Replacement
- Moveable Roof Tie Down Bracket Replacement
- Luggage Carrier Replacement
- Luggage Carrier Slats Replacement
- Luggage Carrier Rivnut Replacement
- Description and Operation
- Special Tools and Equipment
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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.