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post #1 of (permalink) Old 04-26-2015 Thread Starter
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7500 Mile Road Trip

We've had our 2014 2LTZ Impala, with 20s,Nav, and premium sound for a year now.

13,300 miles so far. 7,500 of them on our recent winter sojourn to the west coast and 3 months in Lake Havasu. We left on 1/9. We were full fully loaded for weight

Here's a little report on the car. Except my rant on the nav below, this car is a real cruiser!!

Ride...A
Noise...A
Handling..A
MPG .. A
...my last tank home, with 160 miles at 72 MPH and 130 miles at 62 produced 32.53. Running through the mountains at 81 produced 26-28.5 MPG. Overall MPG with a few tanks of very short trip town driving was 24.44. Worst tank was 13.70.
Sound system and media set up ...A. One small annoyance is that many times when you hit the media button, it has to relearn everything in the drives and won't go to shuffle until you hit browse and grab a title somewhere down the list. It wants to play the same song over and over again until you got to browse
Interior cubby room...A
Trunk room...A

I found myself using the info speed limit display much more than I thought. Very handy! As has been discussed here, the analog speedo display is not accurate..in our case, it reads a good 1.5 fast per my Garmin. The info display speed is right on with the Garmin.

The Nav unit is the worst I've ever had. Hard to believe GM chose this program for such a nice car. It puzzles me that GM doesn't use the exact same unit across all models?

The ETA is always wrong until a couple miles away. Mapping is way off on best routes. I believe this is because the available filters don't include 4 lane roads....or at least that's my guess. It's either: 'fastest or shortest.' If you choose fastest, it seems to default to freeways. If you use shortest, it will use the shortest route, regardless of lanes. Without my trusty little Garmin Nuvi 2597 LMT along, we'd have added several 100 miles to the journey. Another annoyance was that the clock, even set to cell phone network time, did not pick up the 3 time zones we went through. Pretty frustrating. The nav unit should also display the speed limit on the display screen, like my Garmin does. The $170 Garmin was better in every possible way from the OEM unit in our car.

Daytime glare rendered the entire display pretty much useless. Holding my Garmin up at the same angle as the nav glass produced a crystal clear display. Why they didn't figure this part before signing onto it I'll never know? Then there is the lack of user friendly interface...such as a split screen showing exits and the selected POIs they offer (10 Lacrosse)...or the lack of showing the next turn you're headed for without hitting the turn list...or the continual default to a distance I didn't set when trying to find something else in there like rest areas.....Never did find them in the POI menu, but managed to bring them up by voice command. The nav set up in our 2010 Lacrosse was much better than this one! The nav interface with the radio/media info was also inferior to our Buick. The only redeeming feature of the system is the voice recognition which works pretty well.

Overall, excellent cruising car, but very disappointed in the nav program and display glare
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post #2 of (permalink) Old 04-26-2015
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Have you contacted GM about this.? I know that at Automotive Forums .com - Car Chat Forum - Connecting the Auto Enthusiasts they did or still have a GM customer satisfaction rep that would reply contact the poster to remedy the situation.Create an account and post under Chevrolet\impala. Maybe there are different NAV system solutions that will plug into the space in your dash and you have the entry level and if you complain they will swap it out for a better NAV system. This just a guess. Go back to your dealership, call GM, E-mail GM. Tell them you want to return the car. Do the same in the dealership ( LOUDLY) lol
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post #3 of (permalink) Old 04-26-2015
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Yep--they will create a brand new nave system for him right there....
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post #4 of (permalink) Old 04-26-2015
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...and if not..just loudly throw a hissy fit in all GM directions to return it to the dealer with 13,300 miles after a year...and see just how successful that LOL approach works out...

2015 Chevy 2LTZ
Silver Ice Metallic
Jet Black/Dark Titanium Leather
20s
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post #5 of (permalink) Old 04-27-2015 Thread Starter
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I'm going for an oil change tomorrow. I checked on nav updates before for this...no soap.
I'll check again tomorrow. I didn't buy the car at this dealership, but I'll call to where I did...not close to here. This local dealership has treated me very well over time and I'm good friends with several there.

An inferior nav unit isn't enough to go to the mat for, but I might shake some trees
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post #6 of (permalink) Old 04-29-2015 Thread Starter
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Going in next week specifically for nav. ...shooting for a new one
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post #7 of (permalink) Old 06-17-2015 Thread Starter
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Well, I finally got hooked up with the IT mechanic guy at my dealership about the Nav set up. Could have happened earlier, but was no big deal to wait

Here's the deal on these systems. GM should be ashamed of themselves for contracting such an inferior program. There is no fix for it because PIC6075 & 6075A state that:

"The NGI system calculates the ETA by using the same speed value for the entire route"

Huh? $75 dollar Garmins have used different speed limits for many years. It's in the software. Appears to be pretty basic stuff these days! To make it even worse, the info system in the dash console does have every speed limit in it...probably uses something from On Star? ...but doesn't talk to the Nav system...but they're all interconnected? How could such a glaring omission be acceptable? This nav is far worse than our 10 Lacrosse in most every way shape or form, but voice recognition. The whole system works very well for voice recognition. The cell auto set time zone thing takes about 8 days to know it's changed zones. Evidently there is a software update for that. That will go in next Thursday.

They also fixed a driver's seat harness recall I didn't know about...the harness needs to be slightly rerouted on the bottom back of the seat.
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