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99 silverado oxygen sensors?

I replaced both oxygen sensors on my 99 silverado 4.8 but the code comes back after a couple of days. I used oem sensors to replace them both

Update:

I am talking about oxygen sensors there are none on the gas line or fill hoses

2 Answers

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  • Anonymous
    10 years ago
    Favorite Answer

    There's also one on the fill tube to the gas tank.Check it out.You could even need to replace the gas cap.

  • 4 years ago

    common. basically take out the present blown bulb from the motorized automobile. bear in mind the way you took out, pay interest to the legs of the bulb. If the essential bulbs do not artwork, analyze on the courting. analyze on the fuse if the courting is right.

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