LEMON Manuals
: Even more car manuals for everyone: 1960-2025
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Hummer
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2008
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H3 Alpha
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls And Fuel - 5.3L - DTC P0335 To DTC P2138
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DTC P0420 or P0430
>>
DTC Descriptors
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DTC Descriptors
DTC P0420
Catalyst System Low Efficiency Bank 1
DTC P0430
Catalyst System Low Efficiency Bank 2