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 1402 (DOOR SYSTEM, MIRROR SYSTEM & WINDOW SYSTEM)
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Section 1402 (Door System, Mirror System & Window System)
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Section 1402 (Door System, Mirror System & Window 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 - Doors
- Diagnostic System Check - Door Systems
- Scan Tool Output Controls
- Scan Tool Data List
- Scan Tool Data Definitions
- Diagnostic Trouble Code (DTC) List
- DTC B1017 or B3970: (Passenger Door Module (PDM)) Output Driver Module (ODM) 1 Performance
- DTC B1017 or B3970: (Driver Door Module (DDM)): Output Driver Module (ODM) 1 Performance
- DTC B1023: Integral Switch Performance
- DTC B1550: Mirror Left Front or Right Front Select Switch Circuit
- DTC B1720: Mirror Up and Down Control Switch Circuit
- DTC B1721: Mirror Left and Right Control Switch Circuit
- DTC B1723: Mirror Motor Control Circuit 1 Performance
- DTC B1724: Mirror Motor Control Circuit 2 Performance
- DTC B3808: Rear Door Lock Relay Circuit
- DTC B3809: Rear Door Unlock Relay Circuit
- DTC B3819: Left Rear Power Window Up Relay Circuit
- DTC B3820: Left Rear Power Window Down Relay Circuit
- DTC B3821: Window Lockout Circuit Low
- DTC B3822: Right Rear Power Window Up Relay Circuit
- DTC B3823: Right Rear Power Window Down Relay Circuit
- DTC B3824: Window Lockout Circuit Low
- Symptoms - Doors
- Power Windows Inoperative - Express Down Function
- Power Windows Inoperative - Lockout Function
- Power Window Inoperative - Driver Door
- Power Window Inoperative - Passenger Door (Front Door)
- Power Window Inoperative - Passenger Door (Rear Door)
- Door Ajar Indicator Malfunction
- Power Door Locks Inoperative (Front Door(s))
- Power Door Locks Inoperative (Rear Door(s))
- Power Door Locks Inoperative - Endgate/Liftgate
- Power Mirrors Inoperative
- Power Mirrors - Folding Inoperative
- Power Mirrors - Memory Functions Inoperative
- Heated Mirrors Inoperative
- Repair Instructions
- Power Window Switch Replacement - Rear Door (Chevrolet)
- Switch Replacement - Door Lock and Side Window - Driver
- Switch Replacement - Door Lock and Side Window - Passenger
- Power Mirror Switch Replacement
- Door Handle Bezel Replacement
- Trim Panel Replacement - Side Front Door
- Trim Panel Replacement - Side Rear Door
- Water Deflector Replacement - Front Door
- Water Deflector Replacement - Rear Door
- Door Replacement - Side Front
- Door Replacement - Side Rear
- Door Check Link Replacement
- Door Handle Replacement - Front Outside
- Door Handle Replacement - Rear Outside (TrailBlazer EXT, Envoy XL)
- Door Handle Replacement - Rear Outside (TrailBlazer, Envoy, Bravada)
- Door Handle Replacement - Inside
- Lock Actuator Replacement - Front Door
- Lock Actuator Replacement - Rear Door
- Lock Cylinder Replacement - Door
- Latch Replacement - Front Door
- Latch Replacement - Rear Door
- Striker Replacement - Door
- Lock Striker Adjustment - Door
- Wiring Harness Replacement - Front Door
- Wiring Harness Replacement - Rear Door
- Window Regulator Replacement - Front Door
- Window Regulator Replacement - Rear Door (TrailBlazer, Envoy, Bravada)
- Window Regulator Replacement - Rear Door (TrailBlazer EXT, Envoy XL)
- Window Regulator Motor Replacement - Door
- Window Replacement - Front Door
- Window Replacement - Rear Door (TrailBlazer EXT, Envoy XL)
- Window Replacement - Rear Door (TrailBlazer, Envoy, Bravada)
- Window Weatherstrip Run Channel Assembly Replacement - Front
- Window Weatherstrip Run Channel Assembly Replacement - Rear (TrailBlazer, Envoy, Bravada)
- Window Weatherstrip Run Channel Assembly Replacement - Rear (TrailBlazer EXT, Envoy XL)
- Sealing Strip Replacement - Rear Door Upper
- Sealing Strip Replacement - Front Door Window Belt Outer
- Sealing Strip Replacement - Rear Door Window Belt Outer
- Sealing Strip Replacement - Rear Door Window Belt Inner
- Weatherstrip Replacement - Auxiliary
- Weatherstrip Replacement - Front Door Opening
- Weatherstrip Replacement - Rear Door Opening
- Mirror Replacement
- Motor Replacement - Power Mirror
- Mirror Face Replacement
- Mirror Lens Replacement - Turn Signal
- Description and Operation
- Power Windows Description and Operation
- Power Door Locks Description and Operation
- Door Ajar Indicator Description and Operation
- Outside Mirror Description and Operation (Power Mirrors)
- Outside Mirror Description and Operation (Heated Mirrors)
- 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.