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ETA on Navigation is way off

sllarson55

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sllarson55 Enthusiast

sllarson55

Posted
Posted

When I enter my destination in my navigation I am seeing that the Estimated Time of Arrival is much later than it should be. I have really only used this twice. The first time it was for an 8 hour trip and it showed that my ETA was 3 1/2 hours longer than it ended up being. The second time I used the navigation was for a 3 hour trip and it showed that it was going to take me 5 1/2 hours. Of course these numbers shrink as I get closer to my destination but it is nice to see what it will be when you enter the address. My Garmin was always within 10 minutes, which was nice. Am I missing some setting or something? Is there a traffic setting that is causing these issues? Any help would be great. Thank you.

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fondupot Senior Enthusiast

fondupot

Posted
Posted

Check the "routing Preferences" in the Nav menu. You may have some of the roads turned off, so it calculates a longer path around thus extending your ETA.

 

I've used the NAV a lot on short trips and long trips. It's always been very accurate within a few minutes or so.

sllarson55 Enthusiast

sllarson55

Posted
  • Author
Posted

Thank you for the reply. I went out and tried that and many other settings without any success. I've got a very simple 65mph route that I drive often. It always takes me 3 hrs and 15 min. No traffic and no cities. It always shows it as 5 hrs and 3 min. There is one stretch of 80 miles all highway that it says will take 2 hrs and 2 min. I can't figure it out. Is anyone else having these same issues?

Greenagekc Enthusiast

Greenagekc

Posted
Posted

I have noticed this on mine as well. It hasn't been off as much as yours, but definitely off! I had the GM factory nav in a '07, '08, and '10 and it was always very accurate....

gmissed Enthusiast

gmissed

Posted
Posted

When I enter my destination in my navigation I am seeing that the Estimated Time of Arrival is much later than it should be. I have really only used this twice. The first time it was for an 8 hour trip and it showed that my ETA was 3 1/2 hours longer than it ended up being. The second time I used the navigation was for a 3 hour trip and it showed that it was going to take me 5 1/2 hours. Of course these numbers shrink as I get closer to my destination but it is nice to see what it will be when you enter the address. My Garmin was always within 10 minutes, which was nice. Am I missing some setting or something? Is there a traffic setting that is causing these issues? Any help would be great. Thank you.

Mine does the same thing. I have a Garmin (660) as well and it's quite accurate. Interested to see other opinions as well.

klrrdr Enthusiast

klrrdr

Posted
Posted

Not only did mine give bad times,if you encountered a closed road or detour, instead of rethinking the route, it spent the next 20 minutes telling you to turn around and go back to the closed road. Sometimes I was at destination and it was still showing routes back to closed road. Maxwell Smart called he wants his technology back.

KARNUT Senior Enthusiast

KARNUT

Posted
Posted

Every one I used work like that, I first though their max speed must be 60 or maybe rest stops figured in. Then goes down as you get closer.

jcchevy Enthusiast

jcchevy

Posted
Posted

I notice its off by about 20-30% of actual ETA and does not state true ETA until about 50% of trip is over. My galaxy S4 nav and my garmin i used previously was always within 2-4 minutes immediately.

EXSlider400 Senior Enthusiast

EXSlider400

Posted
Posted

I use mapquest app (works great)and travel about 3500 miles a month. Nav on the old 2008 tahoe was not only way easier to use than the new one(find poi and add favorites) but was more accurate eta. GM really needs to have a software update available for free...New stuff should be easier to use not harder. So far the new Nav was a waste of money.

Dozzer LTZ Enthusiast

Dozzer LTZ

Posted
Posted

After reading this yesterday morning I had never used my Navigation and had a 70 mile run (one way) and it was within 2 mins of being accurate. Also took a different route near the end and it recalculated the route quickly the last 8 miles of the trip. I would suggest having it looked at by the dealer.

sllarson55 Enthusiast

sllarson55

Posted
  • Author
Posted

I left a message for the dealer to call me. $1000 is a lot of money to spend on a navigation system that can't even tell you when you should arrive. Had I ordered the truck, it wouldn't have had navigation. This one was on the lot and the only extra that it had that I wouldn't have ordered was the navigation, so I bought it. I'll update with their response when they call me back.

Kent2500 Enthusiast

Kent2500

Posted
Posted

Not only did mine give bad times,if you encountered a closed road or detour, instead of rethinking the route, it spent the next 20 minutes telling you to turn around and go back to the closed road. Sometimes I was at destination and it was still showing routes back to closed road. Maxwell Smart called he wants his technology back.

 

The road data is local to the navigation unit, thus closed roads, new roads, down bridges, etc. won't be in the database. There are only a few companies (maybe just NAVTEQ and TOM TOM) that provide vector road data and they make money on those updates, so the cost for the DVD data update disk (which typically will also update the software at the same time) goes to the map vendor. For GM (or anyone else) to provide "free" updates would imply their need to charge more upfront to pay the map vendor over time.

 

For long trips, determine the key points to travel thru via an Internet mapping website (Bing which uses NAVTEQ and Google has their own map data) as they are generally more current with more advance routing software behind the service. I don't care for MapQuest (which uses TOM TOM data), but just my opinion. From my own experience, in car navigation products do well with local trips (less road data to process) but not so much for those long trips. For newly added roads, need an update to the data.

 

The core routing software wouldn't be written by any auto company as rather specialized development skills are required and the map vendors already has it written for their road data structure.

Guvner New Member

Guvner

Posted
Posted

I have a 2015 with MyLink and the Navigation ETA is abysmal. Very pretty screen and maps but no ETA that has any math abilities at all. I was hoping it was just a trip to the dealer until I just read this thread. It's always close to 2 hours off on a 4 hour trip while the Garmin, Google Maps, etc. are within a couple minutes.

 

It's embarrassing to say the least that I have to use my cell phone to figure out how long it will take to get to my destination. I was floored to really put it through it's paces this past weekend. I contacted GM and they called back but never set up any service like I was told they would. Left a message so far.

 

Thanks for any comments. It sure should be an easy software fix. Just has to be programming.

 

G..

Greenagekc Enthusiast

Greenagekc

Posted
Posted

It is a joke that this new improved technology is by far worse than what was in the previous models, not to mention what else is out there in other manufacturers! I took a 3 hour trip this past weekend and it told me it was going to take me almost 5 hours! I had already pulled the directions from google maps, which had 3 hours listed and the actual drive was within minutes of 3 hours! Glad I wasted $795!!

sllarson55 Enthusiast

sllarson55

Posted
  • Author
Posted

My dealer finally called me back. He told me that I should press the OnStar button to see if they could fix it for me. I haven't pressed the button. I have more sense than that. Obviously they can't fix it. I could do the math with a pencil and paper and be closer on any length trip in less than a minute.... I'm pretty disgusted with this navigation unit and with GM.

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