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.
2004 Hummer H2 4D Utility PickupFACTORY OEM SERVICE PROCEDURE
Door System
- Specifications
- Schematic and Routing Diagrams
- Component Locator
- Diagnostic Information and Procedures
- Diagnostic Starting Point - Doors
- Diagnostic System Check - Door Systems
- Scan Tool Data List
- Scan Tool Data Definitions
- Diagnostic Trouble Code (DTC) List
- DTC B1023: Integral Switch Performance
- DTC B1544, B1600, or B1605: Mirror Motors Common Circuit
- DTC B1580, B1590, B1610, or B1620: Mirror Position Sensor Circuit
- DTC B1640 or B1645: Mirror Heater Circuit
- DTC B1722: Mirror Power Fold Control Circuit
- DTC B3808: Rear Door Lock Relay Circuit
- DTC B3809: Rear Door Unlock Relay Circuit
- DTC B3819: Left Rear Window Up Control Circuit
- DTC B3820: Left Rear Window Down Control Circuit
- DTC B3821: Left Rear Window Relay Power Circuit
- DTC B3822: Right Rear Window Up Control Circuit
- DTC B3823: Right Rear Window Down Control Circuit
- DTC B3824: Right Rear Window Relay Power Circuit
- DTC B3825: Cargo Door/Liftgate Lock Signal Circuit
- 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(s))
- Door Ajar Indicator Malfunction
- Power Door Locks Inoperative (Front Door(s))
- Power Door Locks Inoperative (Rear Door(s))
- Power Door Locks Inoperative - One Door or Switch
- Power Door Locks Inoperative - Endgate/Liftgate
- Power Mirrors Inoperative
- Power Mirrors - Folding Inoperative
- Power Mirrors - Memory Functions Inoperative
- Mirrors - Outside Automatic Day-Night Feature Inoperative
- Heated Mirrors Inoperative
- Repair Instructions
- Power Window Switch Replacement - Rear Door
- Switch Replacement - Door Lock and Side Window - Driver
- Switch Replacement - Door Lock and Side Window - Passenger
- Handle Bezel Replacement - Inside
- Handle Bezel Replacement - Inside - Front
- Handle Bezel Replacement - Inside - Rear
- Trim Panel Replacement - Upper Extension
- Trim Panel Replacement - Side Front Door
- Trim Panel Replacement - Side Rear Door
- Water Deflector Replacement - Front Door
- Water Deflector Replacement - Rear Door
- Door Adjustment - Front
- Door Replacement - Front
- Door Adjustment - Rear
- Door Replacement - Rear
- Hinge Replacement - Front Door
- Hinge Replacement - Rear Door
- Door Check Link Replacement
- Door Handle Replacement - Front Outside
- Door Handle Replacement - Rear Outside
- Door Handle Replacement - Front Inside
- Door Handle Replacement - Rear Inside
- Lock Cylinder Replacement - Door
- Binding Lock Cylinders
- Latch Replacement - Front Door
- Latch Replacement - Rear Door
- Striker Replacement - Door
- Lock Striker Adjustment - Door
- Door Hardware Lubrication
- Wiring Harness Replacement - Front Door
- Wiring Harness Replacement - Rear Door
- Module Replacement - Front Power Window
- Module Replacement - Rear Power Window
- Window Regulator Motor Replacement - Front Door
- Window Regulator Motor Replacement - Rear Door
- Window Replacement - Front Door
- Window Replacement - Rear Door
- Window Run Channel Replacement - Rear Door
- Window Run Channel Replacement - Front Door
- Window Stabilizer Replacement - Front Door
- Window Stabilizer Replacement - Rear Door
- Sealing Strip Replacement - Front Door Window Belt Outer - Front
- Sealing Strip Replacement - Rear Door Window Belt Outer
- Sealing Strip Replacement - Rear Door Front Auxiliary
- Weatherstrip Replacement - Front Door
- Weatherstrip Replacement - Front Door Window
- Weatherstrip Replacement - Rear Door Window
- Weatherstrip Replacement - Front Door Upper Auxiliary
- Weatherstrip Replacement - Rear Door Upper Auxiliary
- Weatherstrip Replacement - Front Door Auxiliary
- Weatherstrip Replacement - Rear Door Auxiliary
- Weatherstrip Replacement - Rear Door
- Weatherstrip Replacement - Front Door Opening
- Weatherstrip Replacement - Rear Door Opening
- Mirror Replacement
- 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)
- Outside Mirror Description and Operation (Auto Day - Night Mirrors)
- Special Tools and Equipment
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.
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