I just received delivery of my C7 earlier this week. I've noticed the GPS is 50/50 at best at determining the location of the vehicle on the map. It's usually off by a few blocks. At times it'll be when there is no GPS signal but it sometimes does that even with a signal as well. In addition, I can have not a cloud in the sky in the wide open and it'll sometimes in these conditions show "no signal."

I'm familiar with how GPS works and that the car will utilize "dead reckoning" to determine location without a signal but any idea why it's all over the place? Why with a clear blue sky with no obstruction is it showing "no GPS" at times? Is this a common problem? I'm a bit disappointed with this.

 

This has been reported in several threads with the fix, which from memory was a pinched GPS wire at the mirror (related to PDR).

See these threads:

https://www.corvetteforum.com/forums...r-gps-box.html

https://www.corvetteforum.com/forums...ps-issues.html

 

The GPS is totally accurate on mine (within a few feet) and I never lose signal unless I am in a garage.

 

Yup..

My Nav (except for one time and Garmin-equipped users experienced the exact same failure) has never let me down. Interestingly, that failure was in the Bowling Green area

(15K miles, including 6100 miles of it as part of the NCC a couple of months ago)

 

thanks...looks like I'm calling the dealer then

 

Mine has always been on the money (2014). Here is what the car shows with my car backed into my garage. Even shows the icon in the correct orientation. Very cool IMO!

 

I got mine back today. It was an easy fix and it works perfect now.

 

What was the fix action? Thanks.

Jeff

 

Was the fix the same as others posted? Where they put some foil tape around the antenna wire?

This is what I had when I picked up my car with my $1800 option on my 10 hour trip home.



This is what happens when I want to use my Nav on the way out of town:

 

There exists an interesting phenomenon locally concerning automotive GPS (and satellite radio). My cars (both my daily driver - a MB - and the Corvette) are parked in a covered parking structure where I work at a major medical center overnight, on the night shift as a trauma radiologist. When I leave in the morning, in each car, the GPS does not know where it is. Upon pulling out of the parking deck, the car gets placed on the map miles from where it actually is. This happened in my previous daily driver (also Mercedes-Benz), my new daily driver and the Corvette as well. With some frequency, I also park in other covered parking structures around town and this never happens in any of those. The dead reckoning system in these cars works very well in these parking structures and the car always knows where it is when I leave them. It is only the hospital parking structure where this is true.

Strangely, just driving by the medical center, the GPS will mislocate the car almost every time. Also, satellite radio craps out each time you drive by the medical center in each car as well as my son's Volkswagen Jetta.

My tinfoil hat persona tends to think that there is some sort of security jamming device present around the hospital. This is a 1200 bed major medical center which covers several city blocks.

(Cue the Outer Limits theme music.)