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Compass does not display in DIC





In my 2014 GMC Sierra AllTerrain model the compass display in the DIC, which displays just to the left of the cruise control indicator, no longer shows up.  It just went away, I’m not sure exactly when, but, sometime in the last 8 months or so.  I recall that over the last several months it seemed that the compass would sometimes be there,  sometimes not.  Now it is not there at all.  That little digital compass can be handy in some places!


I spent 2.5 hours at the GMC dealer and one of their best techs looking over everything in this truck.  There are no codes indicating a failure in any components in the truck.  He updated all of the software modules, which had some updates/patches due, checked that the truck was receiving GPS signal (it is...), checked all of the functions of the DIC and infotainment center and found nothing wrong or anything to correct this.  He finally took an educated guess that maybe because my OnStar had expired (I let it lapse, didn’t want to pay for it...) maybe that was affecting the DIC compass display.  Then I went through the interactions to reactivate my OnStar account to see if that would have any effect, no effect, the DIC compass still does not work.  At some point in my calls I ended up speaking to the the GM Infotainment Level 1 tech support about this issue and, while they tried to be helpful, what they could add was that from what they know of the DIC compass it has nothing to do with OnStar and should not be affected by OnStar being active or not, nor does the DIC compass get updated by GPS.  But, they were not really clear on how that compass works.  


Anyone have any ideas?



Edited by FallingLeaf
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I have the same issue. I was told the compass gets its information from the shark fin antenna on the roof of the truck. I took my antenna off and cleaned up the connections and then when I started my truck the compass came back, but only for a second then disappeared again. I’ve seen it come on randomly for a second or two like that before though so I’m not sure what to do. Maybe our antennas are fried. 

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