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#1
10-09-2009, 08:53 AM
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O2 sensor question
98 Grand AM GT with 3.1 auto - I need to replace the O2 sensor before the cat BUT both parts stores I have checked with have a sensor with 4 connectors but in a square plug - mine is a flat plug - any ideas what is up? I just aquired the car through a trade so know nothing about them.
Thanks in advance for any information. 
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#3
10-09-2009, 11:41 AM
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Re: O2 sensor question
The 10th is a W so it is a 98 BUT I have good reason to believe (PS pump only on with 1 loose bolt - exhaust not tightned up - sheared wire on O2 sensor) to believe that the engine has been replaced. The engine could be from a 96 or something. Would that explain the plug difference? Thanks!
Engine is a 96 - thanks! Last edited by TimLorentzen; 10-09-2009 at 07:50 PM.
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