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 H3T Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Repair and Diagnosis
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Quick Lookups
Common Specs & Procedures
DTC Index
Electrical Component Locations- Electrical Component Locator
- Wiring Systems And Power Management - Ground & Electrical Center Views
- Wiring Systems And Power Management - Luggage Compartment, Wheel & Underbody Component Views
- Wiring Systems And Power Management - Master Component List & Front Of Vehicle Component Views
- Wiring Systems And Power Management - Passenger Compartment & Door Component Views
- Wiring Systems And Power Management - Powertrain, I/P And Center Console Component Views
Fluids
Technical Bulletins
Tire Fitment
Wiring Diagrams
- Accessories & Equipment
- Anti-Theft Systems
- Body Interior
- Collision/Avoidance
- Communication Devices
- Cruise Control Systems
- Entertainment Systems
- Exterior Lights
- Gauges & Instrument Panels
- Headlights
- Heated Glass/Defoggers
- Horns
- Ignition Switch/Steering Lock
- Infotainment
- Interior/Exterior Trim
- Interior/Illumination Lights
- Memory Modules
- Mirrors
- Seats
- Steering Column Switches
- Warning Systems
- Window Motors & Regulators
- Wiper/Washer Systems
- Body & Frame
- Brakes
- Drivelines & Axles
- Electrical
- Body Electrical
- Component Connector End Views - Index
- Component Connector End Views (1 Of 3)
- Component Connector End Views (2 Of 3)
- Component Connector End Views (3 Of 3)
- Inline Harness Connector End Views
- Inline Harness Connector End Views - Index
- Power Outlets
- Wiring Systems And Power Management - Introduction
- Wiring Systems And Power Management - Service, Repair, Troubleshooting & Diagnosis
- Wiring Systems And Power Management - DTC B0005 To DTC B1374
- Wiring Systems And Power Management - DTC B1382 To DTC B1443
- Wiring Systems And Power Management - DTC B1477 To DTC B1478
- Wiring Systems And Power Management - Ground & Electrical Center Views
- Wiring Systems And Power Management - Luggage Compartment, Wheel & Underbody Component Views
- Wiring Systems And Power Management - Master Component List & Front Of Vehicle Component Views
- Wiring Systems And Power Management - Passenger Compartment & Door Component Views
- Wiring Systems And Power Management - Powertrain, I/P And Center Console Component Views
- Charging Systems
- Component Locations
- Electrical Component Locator
- Wiring Systems And Power Management - Ground & Electrical Center Views
- Wiring Systems And Power Management - Luggage Compartment, Wheel & Underbody Component Views
- Wiring Systems And Power Management - Master Component List & Front Of Vehicle Component Views
- Wiring Systems And Power Management - Passenger Compartment & Door Component Views
- Wiring Systems And Power Management - Powertrain, I/P And Center Console Component Views
- Gauges
- Horns
- Motors, Switches, Relays
- Component Connector End Views - Index
- Component Connector End Views (1 Of 3)
- Component Connector End Views (2 Of 3)
- Component Connector End Views (3 Of 3)
- Inline Harness Connector End Views
- Inline Harness Connector End Views - Index
- Power Outlets
- Wiring Systems And Power Management - Introduction
- Wiring Systems And Power Management - Service, Repair, Troubleshooting & Diagnosis
- Wiring Systems And Power Management - DTC B0005 To DTC B1374
- Wiring Systems And Power Management - DTC B1382 To DTC B1443
- Wiring Systems And Power Management - DTC B1477 To DTC B1478
- Wiring Systems And Power Management - Ground & Electrical Center Views
- Wiring Systems And Power Management - Luggage Compartment, Wheel & Underbody Component Views
- Wiring Systems And Power Management - Master Component List & Front Of Vehicle Component Views
- Wiring Systems And Power Management - Passenger Compartment & Door Component Views
- Wiring Systems And Power Management - Powertrain, I/P And Center Console Component Views
- Starter
- Wiring Diagrams
- Body Electrical
- Engine Mechanical
- Engine Performance
- General Information
- Abbreviations
- Basic Trouble Shooting
- Brakes
- Check Lists
- OBD-II Drive Cycles - 3.7L
- Driveline/Axles
- DTC Index
- Electrical
- Engine
- Engine Performance
- Electrostatic Discharge Warning - General Information
- Engine Performance Diagnostic Routine Outline - General Information
- Engine Performance Safety Precautions
- Map - Engine Performance & Maintenance
- Parasitic Load Explanation & Test Procedures - General Information
- State Emission Standards - Diesel
- State Emission Standards - Gas
- Waveforms - Injector Pattern Tutorial - General Information
- Map - Exhaust Systems
- Heating, Ventilation & A/C (HVAC)
- Hoist/Jack
- Identification
- Metric Conversions
- OEM General Information
- Reset Procedures
- RPO Codes
- Specifications Index
- Steering
- Traction Control Disable Procedures
- Trouble Shooting - Manual Transmission - General Information
- Heating, Ventilation & A/C (HVAC)
- Maintenance
- Restraints
- Steering
- Suspension
- Transmission
- External Pages
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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