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Gm Nav Disc Confussion ?

08 Silverado FL

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08 Silverado FL New Member

08 Silverado FL

Posted
Posted

Hi Folks,

New to the forum just joined. Was looking for help with my nav system. Have a 08 Silverado 14,000 on it, bought from local dealer traded my 06 1500 Silverado which I loved. Love the new truck but this whole nav system thing has me bummed. Seems the nav disc was missing when we purchased the truck, have waited three weeks for them to turn up a disc. First one was a ver 3.0 and would even load said it wasn't a map dvd. The second one they got for me is a ver 4.0 GM pn:25974486U not sure where they got it seeing all my research says they are back ordered. The disk look like and OEM and came plastic wrapped and all. So here's the long story longer inserted this disk it said it was updating system and did a software load. System seems fine except the guidance system never prompt for turns or if you go off route. It does tell you to proceed to highlighted route and tells you it's suspending route guidance at the destination. I call the 800 number on the back of the disc gal check with tech but says if voice prompt is on should work must be a bad disc. Now I'll explain I've tried a disc I purchased off ebay as well PN:25912408U and it works excatly the same as the ver 4.0 disc. Any advice are they poorly done copies of an OEM product?? Are the nav disc copiable?

superjim Senior Enthusiast

superjim

Posted
Posted

Disk pn:25974486 is the current disk..2009

Disk pn:25912408 is the previous disk..2008.

 

I have the 25974486 and it works great.

The loading software thing happened to me too when I put the 2009 disk in.

 

Go thru the settings and make sure you have the voice prompts turned on and the volume set at the proper level..ie..loud enough to hear.

 

You can adjust the VOICE volume separately from te radio volume.

Assuming you can get the voice prompts to come on at all...when it says something...turn the radio volume knob "UP" or "DOWN" as needed to have the proper volume for the voice prompts..but you probably have already figured that out.

 

Mine will tell me when I go off of the route it think I should be on. I am not sure if there is a setting for that or not.

There are setting to allow / disallow, toll roads and ferries.

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