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02 sensor wiring

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by GOTSAND4ME2, Apr 11, 2009.

  1. GOTSAND4ME2

    GOTSAND4ME2 Rockstar

    I have a 2000 silverado 4wd. There is four 02 sensors one b4 the cat and one after the cat on both sides.

    There are four wires per sensor and I was wondering which wires are which,

    There is the signal wire, heater wire, heater ground and positive wire I believe

    I mainly need to know which wire is the signal wire

    Thanks for any adivce

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