How many o2 sensors are on the 1997 c 1500 chevy 5.7 2wd??

You have 2 of those and also 2 downstream. You have two banks of cylinders and each one has an upstream o2 sensor and it is located in the exhaust manifold for each bank. Your scan tool should say Bank 1 or Bank 2.

The downstream sensors are after the catalytic converter.

What are the symptoms of a bad upstream O2 sensor? Sensor 1 Sensor 1 is the upstream oxygen sensor. It is the sensor that measures the oxygen content in the exhaust, providing an input to the computer, which determines how to adjust the air/fuel ratio. Sensor 1 is the sensor closest to the engine. Sensor 2 is the downstream oxygen sensor.
Mar 10, 2021

Bank 1, Sensor 1? Upstream or Downstream? - Newparts.com

https://www.google.com/search?q=2015+Chevy+Impala+3.6+upstream+o2+sensor+location

7/8" Oxygen Sensor Socket or Wrench and one electrical plug. https://www.freeautomechanic.com/ho2s-heated-oxygen-sensor.html

Question edited for clarity.
Question moved to model category.

Yes there are three o2 sensors

Bank 1 in the exhaust manifold
Bank 2 in the exhaust manifold
One after the Catalytic Converter.

Not sure what you mean 'where is the best place to put it'? The scan tool tells you which one needs replacing by a P**** Code, or are you just replacing one for fun?

Answered here on JustAnswer dot com

The o2 sensors are located in the exhaust pipe. The one you are looking for is the post cat sensor. The sensor furthest back in the pipe after the catalytic converter.
Mar 19, 2007

Chevy S10 Oxygen Sensor Location: Q&A Guide - JustAnswer

Anrez, your 1991 Chevy trucks O2 sensor could be located in the Y pipe just ahead of converter or in the front portion of the converter.
Check the attached links,instruction and guides, Good luck
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images for o2 sensor wiring



How To Install Replace Upstream O2 Sensor Chevy S10 ...

? 3:30
www.youtube.com/watch?v=B4v4Pbl4pJo
Nov 8, 2013 - Uploaded by 1A Auto Parts http://www.1aauto.com/1A/oxygen-sensors/Chevy/S10-Blazer/1AEOS01028 1A Auto shows you how to ...

you can apply pressure to the sensor while undoing it to force it out or you will have to cut out the thread area and get an O2 sensor bung hole replacement at an auto supply store and weld into place and install a new O2 sensor. bank 1 sensor 1 is located in the front pipe off the manifold that has cylinder #1 on and bank 2 sensor 1 is on the side that cylinder #2 is on like sensor 1. sensor 3 is the one just before the cat.

There is only one sensor in the 1989 Chevy C1500 John you need to check the ground on the ECM

Replacement of oxygen sensors on a 1997 Mercury Tracer LS. Sell the Tracer and buy a Ford Focus, or 2010 Chevy Cobalt, or a new Chevy Cruze, or a Ford Fiesta. This solution is best if your Tracer has over 130,000 miles on it.

BANK 1 UP STREAM OXYGEN SENSOR LOCATION IS LOCATED ON THE REAR EXHAUST MANIFOLD.

bank 1 on a chevy is on the drivers side youll have 4 O2 sensors sensor 1 bank 1 is on the engine side of the cat converter sensor 2 bank 1 is after the cat converter (drivers side )
bank 2 is on the passenger side sensor 1 is pre cat sensor 2 is post cat converter