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
Range Reference
Range Reference Table
| Range | Park | Reverse | Neutral | OD | D | 2 | 1 | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gear | 1st | 2nd | 3rd | 4th | 1st | 2nd | 3rd | 1st** | 2nd | 1st | 2nd*** | |||
| 1-2 Shift Solenoid | ON* | ON* | ON* | ON | OFF | OFF | ON | ON | OFF | OFF | ON | OFF | ON | OFF |
| 2-3 Shift Solenoid | ON* | ON* | ON* | ON | ON | OFF | OFF | ON | ON | OFF | ON | ON | ON | ON |
| 2-4 Band | - | - | - | - | A | - | A | - | A | - | - | A | - | A |
| Reverse Input Clutch | - | A | - | - | - | - | - | - | - | - | - | - | - | - |
| Overrun Clutch | - | - | - | - | - | - | - | - | - | A | A | A | A | A |
| Forward Clutch | - | - | - | A | A | A | A | A | A | A | A | A | A | A |
| Forward Sprag Clutch Assembly | - | - | - | H | H | H | - | H | H | H | H | H | H | H |
| 3-4 Clutch | - | - | - | - | - | A | A | - | - | A | - | - | - | - |
| Lo/Roller Clutch | - | - | - | H | - | - | - | H | - | - | H | - | H | - |
| Lo/Rev Clutch | A | A | - | - | - | - | - | - | - | - | - | - | A | - |
|
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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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