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.
2006 Hummer H3 AutomaticFACTORY OEM SERVICE PROCEDURE
Engine Controls Component Views
| Callout | Component Name |
|---|---|
| 1 | Powertrain Control Module C1 (Body Harness) |
| 2 | Powertrain Control Module |
| 3 | Heated Oxygen Sensor (HO2S) 2 |
| 4 | Fuse Block - Underhood |
| 5 | Engine Harness |
| 6 | Heated Oxygen Sensor (HO2S) 1 |
| 7 | Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor |
| 8 | Powertrain Control Module C3 (Engine Harness) |
| 9 | Powertrain Control Module C2 (Engine Harness) |
| Callout | Component Name |
|---|---|
| 1 | Manifold Absolute Pressure (MAP) Sensor |
| 2 | Throttle Body |
| 3 | Ignition Coil 3 |
| 4 | Ignition Coil 2 |
| 5 | Ignition Coil 1 |
| 6 | Camshaft Position (CMP) Actuator Solenoid - Bank 1 Exhaust |
| 7 | Engine Oil Pressure (EOP) Switch |
| 8 | Heated Oxygen Sensor (HO2S) 1 |
| 9 | Engine Coolant Temperature (ECT) Sensor |
| 10 | Engine Coolant Temperature (ECT) Sensor Connector |
| 11 | C101 Fuel Injector Harness to Engine Harness |
| 12 | Ignition Coil 5 |
| 13 | Ignition Coil 4 |
| Callout | Component Name |
|---|---|
| 1 | Evaporative Emission (EVAP) Canister Purge Solenoid Valve |
| 2 | Starter Solenoid |
| 3 | Knock Sensor (KS) Bank 2 |
| 4 | Crankshaft Position (CKP) Sensor |
| 5 | G102 |
| 6 | G103 |
| 7 | Engine Block Heater |
| 8 | Camshaft Position (CMP) Sensor - Intake |
| 9 | Camshaft Position (CMP) Sensor - Exhaust |
| Callout | Component Name |
|---|---|
| 1 | Clutch Start Switch (MA5) |
| 2 | Accelerator Pedal Position (APP) Sensor |
| 3 | Steering Wheel Position Sensor (JL4) |
| 4 | TCC Brake/Cruise Release Switch |
| 5 | Stop Lamp Switch |
| 6 | Park Brake Switch |
| 7 | Clutch Release Switch (MA5) |
| Callout | Component Name |
|---|---|
| 1 | Fuel Tank Pressure (FTP) Sensor Connector |
| 2 | Fuel Pump and Sender Assembly |
| 3 | Evaporative Emission (EVAP) Canister Vent Solenoid Valve |
| 4 | Chassis Harness |
| 5 | Fuel Tank |
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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