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.
2003 Hummer H2FACTORY OEM SERVICE PROCEDURE
Body & Frame: Seats
- Specifications
- Schematic & Routing Diagrams
- Component Locator
- Diagnostic Information & Procedures
- Diagnostic Starting Point - Seats
- Diagnostic System Check - Power Seat Systems
- Scan Tool Data List
- Scan Tool Data Definitions
- Diagnostic Trouble Code (DTC) List
- DTC B1735, B1740, B1745, B1750, B1755, B1760, B1815, B1820, B1830, B1835, B1840, B1845, B1940, OR B1945: Switch Input To Driver Seat Module Is Active Too Long
- DTC B1770, B1775, B1780, B1785, B1790, B1805, OR B2415: Motor Control Circuit Shorted To Ground, Battery Positive Voltage, Or Open
- DTC B1825: Recline Motor Position Sensor Signal Circuit Voltage
- DTC B1850, B1860, B1960, B2355, B2365, OR B2375: Position Sensor Movement Not Detected During Adjuster Motor Operation
- DTC B2425 OR B2430: Heater Element Control Circuit Short To Voltage, Short To Ground, Or Open
- DTC B2435 OR B2440: Heated Seat Sensor Signal Circuit Voltage, Or Cannot Reach Seat Temperature
- DTC B3941: Seat Heater Element Voltage Supply Circuit Shorted To Ground
- DTC B3962: Motor Control Circuit Shorted To Ground
- Symptoms - Seats
- Power Seat Inoperative (Driver)
- Power Seat Inoperative (Passenger)
- Power Seat Does Not Move Forward/Rearward (Driver)
- Power Seat Does Not Move Forward/Rearward (Passenger)
- Power Seat Does Not Tilt Forward (Driver)
- Power Seat Does Not Tilt Forward (Passenger)
- Power Seat Does Not Tilt Rearward (Driver)
- Power Seat Does Not Tilt Rearward (Passenger)
- Power Seat Does Not Recline (Driver)
- Power Seat Does Not Recline (Passenger)
- Memory Seat Feature Inoperative
- Lumbar Support Inoperative (Driver)
- Lumbar Support Inoperative (Passenger)
- Heated Seat Always On
- Heated Seat Inoperative
- Heated Seat Always On - Rear
- Heated Seat Inoperative - Rear
- Seat - Hard To Move Forward & Rearward
- Repair Instructions
- Seat Replacement - Front Bucket
- Seat Cushion Frame Replacement - Front
- Seat Cushion Trim Cover & Pad Replacement
- Seat Back Cover & Pad Replacement - Front
- Seat Back Frame Replacement - Front
- Seat Back Hinge/Recliner Mechanism Replace - Front
- Seat Back Recliner Handle Replacement - Front
- Lumbar Replacement - Front Seat
- Lumbar Switch Replacement
- Seat Adjuster Replacement - Front
- Seat Adjuster Track Cover Replacement - Front
- Seat Adjuster Motor Replacement - Front
- Seat Switch Replacement - Power
- Seat Switch Bezel Replacement
- Memory Seat Control Module Replacement
- Memory Seat Calibration Procedure
- Heated Seat Switch Replacement - Front
- Seat Back Heater Element Replacement - Front
- Seat Cushion Heater Element Replacement - Front
- Head Restraint Replacement
- Head Restraint Retainer Replacement - Front Seat
- Armrest Replacement - Front Seat
- Trim Panel Replacement - Front Seat
- Seat Replacement - Rear No. 1
- Seat Cushion Frame Replacement - Rear
- Seat Cushion Cover & Pad Replacement - Rear
- Seat Back Cover & Pad Replacement - Rear
- Seat Back Frame Replacement - Rear
- Seat Back Cover Replacement - Rear Folding
- Seat Back Latch Replacement - Rear
- Heated Seat Switch Replacement - Rear
- Seat Cushion Heater Replacement - Rear
- Armrest Replacement - Rear Seat
- Seat Replacement - Rear No. 2
- Description & Operation
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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