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what year Tahoe do you have? some have 3 and some have 4 sensors. replacing sensors is like throwing darts at a dart board, you hope you hit something. there are so many things that can set these codes, like fuel pressure,MAP sensor,MAF sensor.
The only true way to tell what is going on is to monitor the fuel trims with a scanner
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30 years GM tech
20 years GM master tech
04 Yellow
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