O2 sensors

[thdrill]

Just wondering:
a) How many O2 sensors are on our 03 Hoes?
b) Where are they located?
3) How easy are they to replace?

 

[JKmotorsports]

4 total. 2 before the cats and two after the cats. Fairly straight forward to remove and re-install. Unplug the connector then unscrew the O2 sensor. They may be frozen because of the constant heating and cooling cycles, so have some type of penetrant like Liquid Wrench or WD-40 on hand just in case.

 

[shadow]

Would you guys know what the normal service life is for the O2 sensors?

100,000 mile service item (like the spark plugs)?

Thanks...

 

[thdrill]

Yeah, the problem is I bought the vehicle used and don't know what kind of maintenance schedule was kept so might as well this way I know it was done. OK, I found the two (guessing post Cat) O2 sensors on the downward turn of the exhaust from the engine. Does anyone have any pictures as to the ones before...am going to go look after the engine cools down a bit, but any help is appreciated.

 

[greengumby]

 

[thdrill]

Thanks, that was the diagram I was looking for.

 

[shadow]

Great diagram, thanks.

Are these available on the net somewhere, been lookin' all over for them.

 

[greengumby]

Dunno ...i got the "2 foot" thick service manual and i just scan in the pic takes like a couple minutes but it's worth alot to help out other members ...

 

[greengumby]

Thanks, that was the diagram I was looking for.

Hey no prob glad we could help yah out

 

[greengumby]

Would you guys know what the normal service life is for the O2 sensors?

100,000 mile service item (like the spark plugs)?

Thanks...

There is not an actual preset life span for them. like plugs and wires and oil

They could go at 50k or even last to 150k

 

[shadow]

Thanks, will have to break down and get one - much appreciated.

'00 Tahoe LT - stock
'68 Corvette Conv. L79 - stock

 

[ecrawf099]

I just joined, but this is exactly what I was looking for! This rules.

 

[greengumby]

Hey ! no problem ..glad we could help other fellow hoe owners