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Discussion Starter · #1 ·
2003 tahoe 5.3
scanner showed 02 sensor in right side exhaust
changed it still getting code
preheat something or other in that sensor

must be a loose connection

anybody have the wiring diagram or have had similar
 

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I've used the wiring diagrams in Chiltons and/or Haynes, and found them adequate for O2 sensor circuitry.

What specific code are you getting?
 

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Discussion Starter · #3 ·
I knew I should have written it down:grrrrrr:
 
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