rcrules

rruelas,

Since you got the 4.0 disk, have you used your system with an mp3 music disk yet?

There is a bug with the clock display (on some or all of the units) when you insert an mp3 music disk. You insert the mp3 disk and the clock is displayed. You shut off the truck. The next time you turn on the truck the clock does not display. If you pop out the mp3 disk the clock will come back the next time you start the truck.

I was hoping the v4.0 disk would fix this bug.

Thanks!

rruelas

I heard this was a problem on the XXXXXX66 and 67 units. I have the one ending in 02. I have used mp3 cds before the update and never had a problem. I know it does something with the clock because after i installed it for the first time, my clock on the tabis now larger and in bold fontthan the rest of the tabs on the top. Im thinking that it probably does fix that bug but i cant say for certain. I would say its worth the update.

yatch07

i have a 07 ltz suburban how do i get the free navigation update disc?

73shark

Try going here: https://www.gmnavdisc.com/overview.do

Not sure if it transfers w/ a used vehicle but can't hurt to try.

rcrules

Weird. I have the 25797978 and it has the bug. It must have skipped a generation. I ordered a v4.0 disk on eBay to see if it fixes it.

genestoy

Well, got my 4.0 disc today, inserted it in the nav unit and as rruelas pointed out took about 5 minutes to update the firmware (it shows a white screen with a progress bar that turns green as it goes along).I had previously called GM Nav Disc center to find out if it would erase the preset addresses and the person didn't know so went and asked a "senior technician", came back and told me nope it would not erase the addresses - WRONG - it will erase all addresses. It also makes the clock display larger, which was fine for me. I had copied (by hand) all my addresses down so will now just have to re-do all of them, such a pain as the GM unit will not display any actual coordinates for Lat & Long to make it easy to re-do them.

rcrules

I also received the v4.0c disk (from an eBay auction). It does appear to fix the mp3 disk/clock bug. As a bonus, it doesn't display the "be careful looking at the screen while driving..." disclaimer where you had to press the "OK" button to get to nav mode.

Mississippi_lonewolf

I wish they would tell you what software change were made on V4

SabrToothSqrl

if the head unit had wifi, you could pull the updates directly over the internet... that would be cool...

Nevermind, I guess these units don't have a hard drive and use DVDs for navigation... so that wouldn't work...

yarom

No, you don't. If you go to the URL, input your VIN, they offer an update for $199.

I am going to have my lawyer call them as the vehicle is still under warranty...