API 72HF54V Knock Sensor Fits 1990-1991 Chevy R3500 SERVICE TECH SERVICE TECH

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For 1990-1991 GMC R3500 Knock Sensor API 16834GB SERVICE TECH

Knock Sensor For 1990-1991 GMC R3500 SC238MD SERVICE TECH

For 1990-1991 GMC R3500 Knock Sensor API 31162JHDR SERVICE TECH

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API 81BD45N Knock Sensor Fits 1990-1991 Chevy G30 SERVICE TECH SERVICE TECH