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 H3 AlphaFACTORY OEM SERVICE PROCEDURE
Line Pressure
Line Pressure (4L60-E)
| Pressure Control Solenoid Current (Amp) | Approximate Line Pressure (PSI) |
|---|---|
| 2.9 L/3.7 L/4.2 L/4.3 L | |
| 0.00 | 170-193 |
| 0.10 | 169-192 |
| 0.20 | 168-188 |
| 0.30 | 156-184 |
| 0.40 | 146-176 |
| 0.50 | 135-166 |
| 0.60 | 121-152 |
| 0.70 | 103-136 |
| 0.80 | 84-117 |
| 0.90 | 63-96 |
| 1.00 | 54-80 |
| 1.10 | 54-62 |
| 4.8 L/5.3 L/6.0 L | |
| 0.00 | 198-227 |
| 0.10 | 197-226 |
| 0.20 | 189-221 |
| 0.30 | 181-216 |
| 0.40 | 168-205 |
| 0.50 | 154-193 |
| 0.60 | 137-175 |
| 0.70 | 114-156 |
| 0.80 | 90-132 |
| 0.90 | 64-105 |
| 1.00 | 53-85 |
| This test must be preformed at 1200 RPM and between 100°F and 200°F. | |
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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