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.
2010 Hummer H3T Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Engine Controls And Fuel - 3.7L - Repair Instructions
- Repair Instructions
- Engine Control Module Replacement
- Crankshaft Position System Variation Learn
- Throttle/Idle Learn
- Engine Coolant Temperature Sensor Replacement
- Mass Airflow Sensor with Intake Air Temperature Sensor Replacement
- Manifold Absolute Pressure Sensor Replacement
- Heated Oxygen Sensor Replacement - Sensor 1
- Heated Oxygen Sensor Replacement - Sensor 2
- Accelerator Pedal Position Sensor Replacement
- Throttle Body Assembly Replacement
- Fuel Pressure Relief (CH 48027)
- Fuel Pressure Relief (Without CH 48027)
- Fuel Pressure Gauge Installation and Removal
- Metal Collar Quick Connect Fitting Service
- Plastic Collar Quick Connect Fitting Service
- Fuel Pump Flow Control Module Replacement
- Fuel Tank Draining (Non E-85)
- Fuel Tank Replacement
- Fuel Tank Pressure Sensor Replacement
- Fuel Level Sensor Replacement
- Fuel Tank Module Replacement
- Fuel Line Replacement - Chassis
- Fuel Tank Filler Hose Replacement
- Fuel System Cleaning
- Fuel Injection Fuel Rail Assembly Replacement
- Fuel Injector Replacement
- Evaporative Emission Canister Purge Solenoid Valve Replacement
- Evaporative Emission Canister Vent Solenoid Valve Replacement
- Evaporative Emission Line Replacement - Engine
- Evaporative Emission Line Replacement - Tank
- Evaporative Emission Line Replacement - Canister to Tank
- Evaporative Emission Line Replacement - Engine to Chassis
- Evaporative Emission Canister Replacement
- Ignition Coil Replacement
- Spark Plug Inspection
- Spark Plug Replacement
- Crankshaft Position Sensor Replacement
- Camshaft Position Sensor Replacement - Exhaust
- Camshaft Position Sensor Replacement - Intake
- Camshaft Position Actuator Solenoid Valve Replacement
- Knock Sensor Replacement
- Secondary Air Injection Pump Replacement
- Secondary Air Injection Pump Inlet Hose Replacement
- Secondary Air Injection Pump Outlet Hose Replacement
- Secondary Air Injection Check Valve Replacement
- Air Cleaner Element Replacement
- Air Cleaner Assembly Replacement
- Air Cleaner Outlet Duct Replacement
- Air Cleaner Resonator and Outlet Duct Replacement
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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