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What are the oxygen sensor wire colors for a 2001 4.3 Chevy thunder?
Wiki User
∙ 12y ago
The O2 sensor wire colors are as follows:
Purple or Purple/White- sensor input to the pcm, or computer
Tan or Tan/White- sensor return (common) to the pcm
Pink or Brown- 12V ignition power to the O2 sensor preheater
Black or Black/White- 12V common or ground return to chassis for O2 sensor preheater.
Wiki User
∙ 12y ago
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