Shark fin leak

[finston]

Hi all,
My 15 Denali shark fin started leaking a little. GPS, compass, and on star no longer work. I went ahead and sealed around it for now. I’m out of warranty in this truck. Is there one route better than another to get this fixed?
Thanks!


Sent from my iPhone using Tapatalk

 

[BADRIDES]

Take it off and silicon underneath real good and re-install.

 

[SnowDrifter]

^^

But use butyl

https://www.ebay.com/itm/Orgavyl-Bu...ght-Retrofit-Tape-9-5MM-x-4-57M-/283098196069

 

[wjburken]

Take it off and silicon underneath real good and re-install.

^^

But use butyl

https://www.ebay.com/itm/Orgavyl-Bu...ght-Retrofit-Tape-9-5MM-x-4-57M-/283098196069

These suggestions above will take care of the leak, which you mentioned you’ve temporarily taken care of. As for why your GPS, Compass and On-Star is not working, you will need to look at the wire harness/connection to make sure you don’t have any water damage.

Not familiar with the 2015 body style but on the 2007-2014 units, if you have a sunroof you can relatively easily get to the harness by taking off the trim around the sunroof and reaching above the headliner.

 

[Rdr854]

I would go to the dealer for a new antenna. I had them replaced on my 16 and 17 Suburbans. The current design is revised so that there won’t be a leak. And on the 16 Suburban, the problem was with reception (no leak).

 

[finston]

Can I purchase the antenna myself? What is involved in removing and installing? I think somewhere I read the headliner has to come off. If I were to take it to a mechanic, any idea how many hours it would be?

Thanks,
Jason

 

[Geojarn]

This happened to me, but no leak, just no gps or on star. I bought a new antenna on rock auto, easy replace. Just remove a pillar cover, assist handle, center console and pull down headliner driver corner, I used paper towel roll to keep it down for enough room to work. 10mm socket to remove and reinstall antenna nut.

 

[Jason101]

I had this exact issue. Its a known issue by Chevy and they replaced it under warranty with one that has a better gasket.