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2008 Hummer H3 Alpha 5.3L Lack of Power
Vehicle bogs down under heavy load. Feels like plugged cats but have driven without cats and no change. fuel pressure is constant 65 psi. No codes. Fuel trims are less than 10%. Spark plugs are clean and not worn. Coolant and air temps match when cold, no ... 
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Related Documents & Media | VIN | 5GTEN13L28 |
| Engine | 5.3 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection / SEFI |
| Emissions | OBD-II Compliant |
| Symptoms | Lack of Power |
| Occurs | Hot |
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Vehicle Data
2008 Hummer H3 Alpha
| VIN | 5GTEN13L28 |
| Engine | 5.3 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection / SEFI |
| Emissions | OBD-II Compliant |
| Symptoms | Lack of Power |
| Occurs | Hot |
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