Gm has a lot to learn about navigation. Mine will send me 90 mile out of the way.

 

I have the '07 Silverado LTZ with factory nav and it works great. I've used Garmin and others and even state of the art gps in my plane and the GM nav has put me right where I want to be with no problems every time. My wife has an '06 Mountaineer with nav and it works fine as well, but is a little slower than mine. Makes me think there's a bug in some - but not all GM navs.

 

Does anyone use the voice command feature and if so does it work? Everytime I try it comes back with something totally different then what I spoke for.. I really have not read up on this feature so maybe doing something wrong.

 

The voice recognition words are pretty specific so might check the manual.

 

every time I go some place in a small town it want navigate all the way. It get me close and say it does not have all the info to get me there. But it show all the streets and the names on it. If i am going from Jackson,Ms to Hattiesburg, Ms it sends me to Meridian, Ms 90 miles out of the way.

 

I live on a rather large lake in FL and for kicks last night I plugged in the Outback Steakhouse that is about 1/2 way around the lake on the other side of the road from the lake. I pulled out of the driveway towards the right and in about 1/2 mile it told me to take the next right. I would have been swimming.

 

What are the little white dots on the screen? I am guessing it's a bread trail but how do I clear them if that's what they are?

 

Turn off the "off-road" feature and the little white dots will go way as well as it won't send you into the drink

 

"DITTO" We just bought a used 2007 Tahoe LTZ (every option available including power boards and navigation system) Due to poor directions and limited animation (black map with aerial view only?!) we rather use our $129 Garmin!!

 

I have seen this problem that your truck is having with the nav unit. As a GM tech for the last 18 yrs I know exactky whats wrong with your nav unit. the onstar antenna is causing interfernce with your gps antenna, replacing it will solve your problem. The gm bullentin # is
PIT4118C: Navigation Radio Displays No GPS Symbol - keywords OnStar UE1 - (Dec 15, 2009)
<TABLE width="95%"><TBODY><TR><TD width="7%">Subject:</TD><TD>Navigation Radio Displays No GPS Symbol</TD></TR></TBODY></TABLE>



<HR><HR>This PI was superseded to update model years. Please discard PIT4118B.
<HR>The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:


Some customers may comment that when using the Navigation System the Navigation map is showing the incorrect location for the vehicle. After further diagnosis, you may notice that the Navigation Radio has no GPS signal which is indicated by a GPS indicator always present on the radio display. The concern may be caused by OnStar antenna overshadowing the GPS signal of the radio.
Recommendation/Instructions:


Disconnect the GPS antenna from the OnStar module. If the No GPS symbol disappears from the radio, replace the OnStar GPS antenna. Do not replace the radio or GPS antenna for the radio. If the No GPS symbol remains, follow normal diagnosis in SI.

Note: It is normal for the vehicle to display the No GPS symbol for up to 2 minutes when the vehicle is started or when the signal is obstructed by large/tall buildings or heavy foliage.