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  1. 09-21-2006, 06:29 PM #1
    ~Firehawk~
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    O2 Sensor question

    Does anyone know what the thread size is for the O2 sendors on my 2001 5.3L silverado? I need to re-tap the hole for one of my sensors and I dont know what size tap I need to look for.
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  2. 09-22-2006, 08:01 AM #2
    Nitrous
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    White
    97 GMC with 02 LS6 engine

    Should be a M18 x 1.5 pitch . I've seen a few 14 MM also but it's more likely to be an 18 MM.
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