Compass, GPS, NAV and OnStar all failing

Cravenfan · March 20, 2015

Fixed last week, it's all good. Also the dealer is making my first truck payment. Will probably call Onstar for a free month extension.

BuyAmericanIron · July 27, 2015

Add my name to the list of failed Shark Fin Antenna. Had the same red line of death, no compass, etc, but no water leaks that I know of. Unfortunately with all of the problems my 2015 Sierra Denali experienced, GMC is going to offer me some kind of a buyback. The selling dealer got the OK from his district rep and told me it was going to a Regional Customer Experience Supervisor for approval. He did say they would likely want to put me back into a 2015 but I am going to push for a 2016. My wife and I have totally lost confidence in this vehicle and after reading all the problems with the 2015 Sierra/Silverado line, we are hoping the 2016 is a better vehicle. Have been buying GM's for 30 plus years and occasionally would have a small problem here and there, but nothing like the continuing problems with this vehicle. Wish me luck for a reasonable offer from GM.

BrownMJ127 · December 3, 2015

ALL,

This fault is a design flaw in the ground circuit that the infotainment computer shares with the ECM and OBD II outlet. Every time a technician plugs a scan tool into the OBD II outlet there is a potential to send a power surge back through the common ground into the infotainment computer. This wipes out OnStar, the GPS, Bluetooth volume output and the navigation. All you will basically have left is the CD player and radio and 50% volume on Bluetooth.

Currently GM refuses to acknowledge or address the design flaw. My personal 2015 Silverado has had this happen twice when I brought the truck in for routine service. The first time was when the dealer installed a software update for the transmission. The second time was just a week ago when the dealer updated the four wheel drive software.

One technique to prevent this from happening is for the technician to remove the fuse to the infotainment computer before he/she plugs a scan tool up to the OBD II plug. If they don't do this there is a 50/50 chance that the infotainment computer will be destroyed by a power surge.

When I take my truck in to the dealer for its routine scheduled service I always tell the service tech to make sure the technician removes the fuse to the infotainment computer before he/she plugs a scan tool up to the OBD II plug. Twice they failed to do what I said and twice they destroyed my computer. Two more time and I'll turn the truck back in to GM as a lemon.

I hope this helps.

Matt

ASE AUTO MASTER TECH

gjernagan16 · December 4, 2016

I am having this issue with my 2017, haven't noticed if onstar is not working though. My remote link app still works most of the time, compass seems to work but about every 2-3 ignition cycles I get the red lines through GPS and don't have any navigation. I had the shark fin replaced last week but issue is still here? any ideas to tell dealer before I go back?

upsfeedr · May 9, 2017

Add me to the list I now have the red line of death guess I'll have to bring it in. It must of happen when it rain a few weeks ago I noticed some water by the left visor.

NQuist22 · September 12, 2018

My GPS / Compass stopped working last week in my 2016 Sierra Denali. Had it in today, assuming it was a fried antenna, but they tested and found that the OnStar module had failed and needs to be repaired.. Advisor said that the failed GPS symptoms are typically the antenna 70% of the time, and the OnStar module 30%... so, call me lucky for beating the odds, i guess....

back to the shop again once the module comes in...

2016 Sierra Denali

20K miles

owned for 12 months

3 trips to shop (so far).

Eshuper · January 6, 2019

Have a 2017 Yukon and I was driving from Tampa to Minneapolis. When we went through Atlanta the gps red x and the Onstar turned red. Well we used phones til we got north and decided to call Onstar. Well did that and they gave me the b2462 code. They said it’s something going on with gps. They asked if I was in Tampa I said no I’m in Minneapolis. I checked my Gmc location and it also says I’m in Tampa. I asked how to fix and they replied go to dealer. So I called around and no one had time to get it in. Since it was around Christmas I knew that was a shot in the dark. So I called Onstar and told the problem that I’m on vacation and feared for safely for my family. They told me I have to get to my dealer which is in Miami. So I forgot about but it and carried on with the vacation. I was driving in Mississippi and decided to stop in Biloxi and stay a few nights. So I had valet take the truck and two days later when we left the gps and Onstar light turned green. So I don’t know if this is a antenna issue? But I was in a parking garage for two days and came back to life. I’m going to the dealer next week in Miami and have them double check the system.