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Did Onstar tell you through the vehicle diagnostic test or in the vehicle on the DIC? Also did you notice a difference, and how if you did. Just curious!On Star was kind enough to let me know it was time to change the in-cabin filter, and it was filthy. Only had the Tahoe for 9 months, couldn't imagine after multiple years.
15 minutes well spent IMO.
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does anyone know if there is one that has a charcoal lining?
I have really good result at work and at home using air purifiers that have secondary charcoal liner, really does a great job removing smells