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 H2 V8-6.2LFACTORY OEM SERVICE PROCEDURE
Knock Sensor: Locations
Powertrain Component Views
Engine - Left Rear (L92)
1 - Valve Lifter Oil Manifold Assembly (VLOM)
2 - Ignition Coil 8
3 - Fuel Injector 8
4 - Ignition Coil 6
5 - Fuel Injector 6
6 - Manifold Absolute Pressure (MAP) Sensor
7 - Throttle Body Assembly
8 - Magnetic Sensor
9 - Camshaft Position (CMP) Sensor
10 - Fuel Injector 2
11 - Ignition 2
12 - A/C Compressor
13 - Fuel Injector 4
14 - Ignition Coil 4
15 - Knock Sensor (KS) 2
16 - Starter
17 - Crankshaft Position (CKP) Sensor
Engine - Right Rear (L92)
1 - Ignition Coil 1
2 - Evaporative Emission (EVAP) Canister Purge Solenoid Valve
3 - Ignition Coil 5
4 - Fuel Injector 3
5 - Fuel Injector 5
6 - Ignition Coil 7
7 - Fuel Injector 7
8 - Engine Oil Pressure (EOP) Sensor
9 - Knock Sensor (KS) 1
10 - Engine Coolant Temperature (ECT) Sensor
11 - Engine Block Heater Connector
12 - Ignition Coil 3
13 - Fuel Injector 1
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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