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Home >> GMC >> 2009 >> Envoy 4.2 S, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 4.2L - Introduction >> Repair Instructions >> Heated Oxygen Sensor Replacement - Sensor 1 >> Notes
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Heated Oxygen Sensor Replacement - Sensor 1: Notes

Special Tools 

J 39194-B  Heated Oxygen Sensor Wrench. See Special Tools .

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