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.
2008 Hummer H3 Base, StandardFACTORY OEM SERVICE PROCEDURE
Front of Vehicle/Engine Compartment Component Views
| Callout | Component Name |
|---|---|
| 1 | Marker Lamp - Left Front |
| 2 | Park/Turn Signal Lamp - Left Front |
| 3 | Headlamp - Left |
| 4 | Fog Lamp - Left Front |
| 5 | Fog Lamp - Right Front |
| 6 | Headlamp - Right |
| 7 | Park/Turn Signal Lamp - Right Front |
| 8 | Marker Lamp - Right Front |
| Callout | Component Name |
|---|---|
| 1 | J185 |
| 2 | J109 |
| 3 | J112 |
| 4 | J120 |
| 5 | Horn |
| 6 | X117 |
| 7 | J134 |
| 8 | X115 |
| 9 | X116 |
| Callout | Component Name |
|---|---|
| 1 | Engine Control Module (ECM) X1 |
| 2 | Engine Control Module (ECM) |
| 3 | Heated Oxygen Sensor (HO2S) 2 (LLR) |
| 4 | Fuse Block - Underhood |
| 5 | Engine Harness |
| 6 | Heated Oxygen Sensor (HO2S) 1 (LLR) |
| 7 | Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor |
| 8 | Engine Control Module (ECM) X3 |
| 9 | Engine Control Module (ECM) X2 |
| Callout | Component Name |
|---|---|
| 1 | Rear Window Washer Fluid Pump |
| 2 | Windshield Washer Fluid Pump |
| 3 | Body Harness |
| 4 | Windshield Wiper Motor |
| Callout | Component Name |
|---|---|
| 1 | Body Harness |
| 2 | A/C Refrigerant Pressure Sensor |
| 3 | A/C Compressor Clutch |
| 4 | Ambient Air Temperature Sensor |
| 5 | Inflatable Restraint Front End Sensor - Right |
| 6 | Lower Radiator Support |
| 7 | Inflatable Restraint Front End Sensor - Left |
| Callout | Component Name |
|---|---|
| 1 | Negative Battery Cable |
| 2 | Battery |
| 3 | Positive Battery Cable |
| 4 | Generator |
| 5 | Engine (LLR) |
| 6 | G120 |
| 7 | G100 |
| 8 | X130 (UE1) |
| 9 | Generator Battery Control Module |
| 10 | Onstar Fuse (UE1) |
| Callout | Component Name |
|---|---|
| 1 | Inflatable Restraint Vehicle Rollover Sensor (ASF) |
| 2 | Yaw and Lateral Accelerometer Sensor |
| 3 | Brake Fluid Reservoir |
| 4 | Electronic Brake Control Module (EBCM) X2 |
| 5 | Electronic Brake Control Module (EBCM) |
| 6 | Electronic Brake Control Module (EBCM) X1 |
| 7 | Brake Fluid Level Switch |
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.
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