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
Power Seat Systems Component Views
| Callout | Component Name |
|---|---|
| 1 | C327 |
| 2 | Seat Adjuster Switch-Driver |
| 3 | Memory Seat Module-C4 |
| 4 | Memory Seat Module-C3 |
| 5 | Seat Bolster/Lumbar Switch-Driver |
| 6 | Seat Recline Motor-Driver |
| 7 | C325 |
| 8 | C329 |
| 9 | C330 |
| 10 | C328 |
| 11 | Seat Rear Vertical Motor-Driver |
| 12 | Seat Front Vertical Motor-Driver |
| 13 | Memory Seat Module-C2 |
| 14 | Memory Seat Module-C1 |
| 15 | Seat Horizontal Motor-Driver |
| 16 | C326 |
| Callout | Component Name |
|---|---|
| 1 | Seat Bolster Motor-Driver |
| 2 | Seat Lumbar Motor-Driver |
| 3 | Heated Seat Element-Driver Cushion |
| 4 | C333 |
| 5 | Seat Belt Switch Connector |
| 6 | Heated Seat Element-Driver Cushion Connector |
| Callout | Component Name |
|---|---|
| 1 | Seat Horizontal Motor-Front Passenger |
| 2 | Seat Front Vertical Motor-Front Passenger |
| 3 | Seat Rear Vertical Motor-Front Passenger |
| 4 | C376 |
| 5 | C377 |
| 6 | C375 |
| 7 | Seat Recline Motor-Front Passenger |
| 8 | Seat Bolster/Lumbar Switch-Front Passenger |
| 9 | Seat Adjuster Switch-Front Passenger |
| Callout | Component Name |
|---|---|
| 1 | Seat Bolster Motor-Passenger |
| 2 | Seat Lumbar Motor-Passenger |
| 3 | Heated Seat Element-Passenger Cushion Connector (w/KA7) |
| 4 | C378 |
| Callout | Component Name |
|---|---|
| 1 | Left Rear Seat |
| 2 | Heated Seat Element Connector-LR |
| 3 | Heated Seat Control module-LR |
| Callout | Component Name |
|---|---|
| 1 | Driver Door Module (DDM) |
| 2 | Driver Inner Door Panel |
| 3 | DDM-C5 (Green) |
| 4 | Memory/Heated Seat Switch-Driver (w/KA7) |
| Callout | Component Name |
|---|---|
| 1 | RSA Controller |
| 2 | Heated Seat Switch-RR (w/KA7) |
| 3 | Accessory Power Outlet-RR |
| 4 | Accessory Power Outlet-LR |
| 5 | Heated Seat Switch-LR (w/KA7) |
Factory Service Tools
Use the Manual With the Right Hardware
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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.