Hello Chevy fans, My crawler hauler is an 89 GMC Suburban. I just aquired it.
Anyhow the O2 sensor wire is just hanging off the sensor. I can find nothing on the harness that it plugs into. Any ideas? Thanks for your help..........and by the way..........I already checked out "FAQ'S" with no results. Thanks again.

well seems pretty strange that it is gone. Should be a cut end somewhere if there isn't a plug for it. If worse comes to worse run a new wire from the computer.

Does the computer indicate which wire it is? I will get back to it tomorrow.

If you have the 1227747 ecm the O2 is pin D7. Normally a purple wire.

Awesome!! That is exactly what I needed to know. I really appreciate the help.

The O2 sensor wire is normally in the same wire loom that runs down the back of the block (behind the distributor or above the bellhousing).