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.
2009 Hummer H2 V8-6.2LFACTORY OEM SERVICE PROCEDURE
Coolant Temperature Sensor/Switch (For Computer): Locations
Powertrain Component Views
Engine - Left Rear
1 - Fuel Injector 1
2 - Evaporative Emission (EVAP) Canister Purge Solenoid Valve
3 - Fuel Injector 3
4 - Fuel Injector 5
5 - Fuel Injector 7
6 - Engine Oil Pressure (EOP) Sensor
7 - Knock Sensor (KS) 1
8 - Ignition Coil 7
9 - Engine Block Heater Connector
10 - Ignition Coil 5
11 - Ignition Coil 3
12 - Engine Coolant Temperature (ECT) Sensor
13 - Battery Cable Junction Block
14 - Ignition Coil 1
15 - Generator
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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