[GrizChev]

The entire assembly requires complete dash removal including radio and all wiring and systems surrounding. If it were me I would re-do the offending sensor. Have a look. Test installing screw without the actuator just to see wassup.

Worst case go to hardware store for a slightly larger diameter self-tapping screw same head and length.


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I realize you've done it but in case it helps settle your mind, the following is for my 2010 3.5 but it should be similar or same for yours. Dash design may vary. Locations should be the same. I read here the 2012's have the same little trap door under the steering wheel to give easy access to the driver side temperature actuator, if it's the one.

Select the help file starting with B:

https://www.impalaforums.com/threads/my-2010-impala-3-5-flex-help-files.1892293/#post-3741761

 

[GrizChev]

@sheila,

When you went with a slightly larger diameter screw, was it this same actuator location, and did you compare the replacement to an existing screw (wondering if replacement was longer)?

Worry is about blind thread holes where a longer fastener could do significant damage or interfere with surrounding objects. In cases like this I often grind the tip down since the female thread already exists (no need for self-tapping). Just wondering.

 

[GrizChev]

Cool. So that location either is thru-holes or deeper than needed blind holes. Works either way! Thanks. Your pain at that time will help all of us who follow!