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How to disconnect o2 wires on ls7 2013??

Old 10-11-2018, 07:48 PM
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froggy47
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Default How to disconnect o2 wires on ls7 2013??

This is really part of my starter removal thread but no help there lately. I can get it totally disconnected & loose but cannot maneuver it out cat on one side engine boss on ther other wire bundles to the front. So I am at taking out the manifold and cat in one piece (like a LT header). Trouble is 2 o2 sensors before/after the cat are connected in some inaccessible area between the engine & firewall. Anyone know how to unclip them without cutting the wires? Even if I did that the new ones would need to be reconnected. Anyone?


I'll take any suggestion.
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Old 10-11-2018, 08:10 PM
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MTPZ06
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Old 10-12-2018, 05:09 PM
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Originally Posted by MTPZ06 View Post
Thanks, good video, so his way was to drop the mani/cat a few inches & THEN disconnect the wires. Well I guess that'll be me trying it next.

Cheers!
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Old 10-12-2018, 05:48 PM
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zblackz06
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Froggy,
I dont remember how I did mine but I surely did not cut any wire,I think I somehow worked the connector loose and was able to disconnect the wires.I will take a look as soon as I can.
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Old 10-12-2018, 05:52 PM
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Originally Posted by zblackz06 View Post
Froggy,
I dont remember how I did mine but I surely did not cut any wire,I think I somehow worked the connector loose and was able to disconnect the wires.I will take a look as soon as I can.
If you know a way, please share. Thanks.
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Old 10-12-2018, 06:30 PM
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zblackz06
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Froggy I hope these crappy pics help,there are 2 harnesses by the firewall that need to be loosened to get to the O2 connector.One has a metal tab that I think has a bolt going through it (look at pic you will see the tab with the hole in it) and the other should have a black plastic clamp that goes around the diameter of the harness.Both harnesses have silver heat reflective tape on them in the pics.



Last edited by zblackz06; 10-12-2018 at 06:31 PM.
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Old 10-12-2018, 06:40 PM
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Thank you. I am going to try disconnecting the manifold/exh and maybe that will move enough to wiggle the starter out. Else I'll disc. the o2's & take it all out. My o2's are ok for now.

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Old 10-12-2018, 06:46 PM
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Yeah loosen the accessible cat to manifold bolts and then loosen/remove the manifold then using sockets and a long extension you should be able to remove the remainder of the cat/manifold bolts.
Good luck it is a bit of a bear to do on your back.
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Old 10-12-2018, 06:57 PM
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Originally Posted by zblackz06 View Post
Yeah loosen the accessible cat to manifold bolts and then loosen/remove the manifold then using sockets and a long extension you should be able to remove the remainder of the cat/manifold bolts.
Good luck it is a bit of a bear to do on your back.
Hah, yeah, wish I was 10-50 years younger. Getting the car really high is a help.

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