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I have a 98 Saffari, there are only 3 sensors, so only one bank, and sesor 3 is the last one, it't found after the catalytic converter, very easy to get at and change, I've done it myself, but since I replaced it, it has died again, so in my case, there is another problem, causing thing, also check your 30A batt intl fuse in the fuse box, that seems to blow around the same time as the sensor, this is the second time this happends to me, after everything was changed it was fine for a few weeks, then it all went bad again...

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16y ago
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Q: On a 1997 GMC Safari 4.3 vortec which O2 sensor is bank 1 sensor 3?
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