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Discussion Starter #1
I was out for a ride today and activated the Nav screen. The map screen appeared on the screen and moved and rotated as we drove along but the map showed us about 50 miles from our actual location. Also the term "GPS" noted on the screen had a red "X" over it (which I assume means it hasn't locked onto GPS satellites). Upon returning home I contacted the tech on GM's Live Chat and was told the GPS should update the satellites on its own (even while sitting my garage), but I wonder about that. I bought the car last week so if needed to update the satellites, I would think it would have done so by now, or at least during the last hour of driving it. Has anyone noticed this when they first bought their C7?
 

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The red x typically means that your GPS is not linking up with any satellites. This is not unusual in a garage of some city canyons, under long overpasses and tunnels. However it should link up automatically once you are not in those types of situations. If yours did not you should take it back to your dealer.
 

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I have the same problems with the GPS and the red X. I have had the car about 6 days. I noticed the red X when I took delivery. The dealer did not know what it meant. I have driven about 300 miles now and observe that the GPS signal comes and goes.
Comments on the other forum speaks of a pinched wire. I contacted customer service but they told me that they had not heard of the situation and wants me to go back to the dealer. I am hesitant about having the dealer possibly tear the dash apart if they don't know what they are looking for. Any comments or information from other may be helpful. Thanks
 

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Discussion Starter #4 (Edited)
I have the same problems with the GPS and the red X. I have had the car about 6 days. I noticed the red X when I took delivery. The dealer did not know what it meant. I have driven about 300 miles now and observe that the GPS signal comes and goes.
Comments on the other forum speaks of a pinched wire. I contacted customer service but they told me that they had not heard of the situation and wants me to go back to the dealer. I am hesitant about having the dealer possibly tear the dash apart if they don't know what they are looking for. Any comments or information from other may be helpful. Thanks
LGVette - I just contacted the service department and they said they have another C7 with the exact same GPS problem and it is scheduled to come in next Monday (Oct 13) to be repaired. The service manager suggested I call him back next Wednesday to get an update on this repair. Thankfully they're not going to experiment with my C7 first! :^)) The service department said it could be something as simple as the GPS antenna connector has become disconnected (or was never connected) but he said if that's the case the dash would need to be taken apart. With [at least] 3 of these same problems now I'm starting to wonder whether maybe someone on the assembly line dropped the ball. In any case, I recommend holding off taking your C7 in for repair until I hear back from this dealership. I'll post an update as soon as I find out.

Suggestion to owners picking up their new C7, make sure your GPS works properly before driving off. I was so overwhelmed with the new technology I overlooked it.

SR-71
 

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Does not sound normal. I have never had that issue.
 

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Mine is intermittentantly doing the same thing after it shows like it is trying to re-route itself,

Did the same thing before the whole center stuff went out. (they replaced screen)
 

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LGVette - I just contacted the service department and they said they have another C7 with the exact same GPS problem and it is scheduled to come in next Monday (Oct 13) to be repaired. The service manager suggested I call him back next Wednesday to get an update on this repair. Thankfully they're not going to experiment with my C7 first! :^)) The service department said it could be something as simple as the GPS antenna connector has become disconnected (or was never connected) but he said if that's the case the dash would need to be taken apart. With [at least] 3 of these same problems now I'm starting to wonder whether maybe someone on the assembly line dropped the ball. In any case, I recommend holding off taking your C7 in for repair until I hear back from this dealership. I'll post an update as soon as I find out.

Suggestion to owners picking up their new C7, make sure your GPS works properly before driving off. I was so overwhelmed with the new technology I overlooked it.

Thanks for the information. I am supposed to get a call from the infotainment specialist tomorrow. I will update him with my intermittent experience and what I have read in the forums. He has told me that there group has not heard of the problem. If they read the forums they surely would have known about it. I am not going to let the dealer starting ripping the dash apart until the cause of this is uncovered. Please keep the forum updated.
 

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Discussion Starter #8
Thanks for the information. I am supposed to get a call from the infotainment specialist tomorrow. I will update him with my intermittent experience and what I have read in the forums. He has told me that there group has not heard of the problem. If they read the forums they surely would have known about it. I am not going to let the dealer starting ripping the dash apart until the cause of this is uncovered. Please keep the forum updated.

No problem, as soon as I get an update from my dealer I'll post the information. My plan to to hold off allowing them to tear into my dash of my C7 until they find a known fix for this problem. By the way, evidently several other C7 owners are having this same problem. Take a look: GPS problems - Chevrolet Corvette Stingray C7 Forum
 

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I have about 500 miles to date and have been using gps religiously, to test accuracy. Seems to be working perfectly. However, the other day I noticed the x'd out gps symbol. I was in a heavily tree lined (but not cover) road traveled everyday and this was first time gps was x'd out. Strange thing is the gps kept providing accurate directions including the distance remaining before each turn. Unless the system maps the route and can , by speed and distance, calculate when to turn, I still had connection with the x'd out gps???
 

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The system can and does manage to estimate your position without GPS once you have started a route and temporarily lost GPS connection, for example in a tunnel. Lots of things can interfere with satellite reception and cause GPS to temporarily lose its connection.
 

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Sailors and navigators call that "Dead reckoning".
 

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Discussion Starter #13
Follow up info - As my service department suggested, I called them back today to find out if they had had any success fixing a C7's Nav (Red X) issue. Turns they not able to fix the GPS "X" problem on the C7 they were working on. The service tech told me he contacted GM and was told they are aware of the GPS "X" problem and were working on a solution and mentioned GM thinks the the problem might be an issue of interference from the XM antenna, but they don't know anything for sure yet. My service department suggested I check back again in 2 weeks to see if GM has provided them any updated information. I'll post again when I hear something new. I'm glad I did held off taking my C7 in for this problem. I hate the thought of the service tech's "experimenting" with trying to find a solution. I much prefer to wait for a real solution. In the mean time I guess I'll be using my Garmin Nuvi. :^(( Hang in there GPS Red X'ers... there's bound to be a solution to this problem eventually.
 

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Discussion Starter #14
I just got back from taking the NCM and Factory Tour in Bowling Green. After the tour I pulled the tour guide to the side, told him about several C7 owners having this Red X problem with their GPS and asked if he could ask someone in the factory if they know about the Red X problem, and if so, is there anything in writing concerning the fix (I was hoping to take something back to my dealership's service department).

The tour guide disappeared into the factory and I waited in the lobby. About 20 minutes later the guide returned and said they factory has been aware of the GPS Red X problem for about a month, and there's an issue with the XM Antenna interfering with the GPS antenna, but said there's currently nothing in writing about the fix. It was suggested I take my C7 to my dealer... ugh. And of course when I talk to my service department they tell me they're waiting on a fix from the factory.

There seems to be a lot of '15's with this problem so hopefully a solid fix will appear soon.
 

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We got our 2015 NCM C7 on 10-23. Had GPS red X before we left town. it would come and go all the way home to NC. GPS shows the "car" location about a 1/2 mile from my home location while sitting in the driveway. I have never seen any other GPS show these types of problems even with XM radio. Do we know if it's just 2015 models ?? I hope everyone who has a problem calls GM and the dealers to let GM know they have frustrated customers.
 

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Discussion Starter #16
RBS C7-As I mention above, I learned first-hand in early September that the Factory is aware of the C7 GPS problem. When I brought up my GPS Red-X issue after the factory tour in September my guide disappeared into the factory,then returned asking if I had my C7 with me because they offered to bring it in and work on it right then, yet they let you drive off with the defect. Pretty damn depressing.

It's obvious that the word about this GPS fix, which someone evidently knows at the factory because they are advising dealerships how to fix it, has not trickled down to the assembly line.
 

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Yeah I just took my 2015 in with the same GPS issue. Of course GM doesn't stand behind it even though it's out of warranty but I have an extended warranty. Too bad they're not like Honda. My Goldwing had an issue with it and the Wing was 10 years old and Honda fixed it for free. I had a 13 year old Honda Goldwing that also had an issue with it and Honda also fixed that for free because they knew it was a known problem yes.
 

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Well it's been 6 weeks back and forth to the dealer mostly in the shop all that time. They charge me $275 to update the PDR software and supposedly insulate the wiring. Well the first time I picked it up the GPS still didn't work so I figured they didn't do the wiring. Picked it up today they put the wire insulation kit in and it worked perfectly for 17 miles home when it would have gone out previously. So I'm going for a long ride tomorrow and see how it acts I'll keep you
 
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