how many oxygen sensors on my 2004 silverado 1500 ls ?
hooked to computer at autozone and they said the o2 sensor was bad. but didn't tell me which one if it has more that one.
and don't just slap in a new sensor without determining why it failed.
you should have up stream and down stream plus bank 1 or bank 2. like bank 1 sensor 1 or bank 2 sensor 2 failure code.
there are at least 3 o2 sensors. like tennisshoes said, the code tells you which one it is. Unless it was another code and they are just speculating its your o2 sensor. They should be able to print them out for you so you can have the actual code.
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