where is the o2 senser on a 4.3 engine

Asked by Mar 02, 2007 at 12:36 PM about the 1991 Chevrolet Blazer

Question type: Maintenance & Repair

1 Answer


Hello snag-- The Oxygen Sensor on your 1991 Chevrolet Blazer is underneath the truck on the passenger side, below the front seat area. You will notice a "Y" shaped exhaust pipe. The Oxygen sensor is located inside of that. Good luck from Bovan.

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