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Chevrolet
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2003
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Silverado 1500 HD, RWD
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Repair and Diagnosis
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Engine Performance
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Testing & Diagnosis
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ENGINE CONTROLS - SELF-DIAGNOSTICS - 4.8L, 5.3L & 6.0L - Flex Fuel & Gasoline
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Diagnostic Tests
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DTC P0133: Ho2S Circuit - Slow Response - Bank 1, Sensor 1 & DTC P0153: Ho2S Circuit - Slow Response - Bank 2, Sensor 1
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Conditions For Setting DTC
Conditions For Setting DTC
The rich-to- lean and lean-to-rich average response time is more than a calibrated value.