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where are the number 1 and 2 oxygen sensors for a 1999 chevy suburban located 2 wheel drive 5.7 liter?

April 26, 2017chevy located oxygen sensors suburban wheel

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where are the number 1 and 2 oxygen sensors for a 1999 chevy suburban located 2 wheel drive 5.7 liter?

1 Answer

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10 Posted

The #1 sensor is between the engine and the cat converter. It assists the computer and is used to adjust air fuel ratio and such. The #2 sensor is between the cat converter and the tail pipe showing and is strictly emissions system only.