How many oxygen sensors???
 

Could someone tell me how many oxygen and heated oxygen sensors are on a 2001 Blazer 2Door 4WD 4.3 V6 please :)

Should be 3. 2 up stream in the front pipe before the catalytic converter and 1 after the converter.

Don't supposed anyone would have the ACDelco part #s for them ???

On RockAuto it says the part number is #2131325 for the ACDelco version

How many oxygen sensors???
 

Mr Melstal,
My local Chevy dealer said the part # for the 3 oxygen sensor(s) is
#19178918, cost is $68.60 ( + tax, if applicable ), GM Parts East.com is saying
part #: 15562866 (for all 3 sensors ), cost: $53.64 (for 1 sensor), check with your local Chevy dealer's Parts Dept. exact price & part #.

Just a word on AC Delco parts. I too like to get AC OEM for my truck, and what I get are approved replacements in an AC Delco box. Seems to work fine though. O2's are about $26 from amazon. Now if I could just find the original numbered spark plug wires made by Packard...

Thank You, Thank You, and Thank You :)

O2 sensors
 

This has been a helpful thread. Does anyone know how many O2 sensors are on a 1999 4.3 ?? Two or three?? Are they all the same part number?

thanks guys!