Hi, I just purchased a 2008 Tahoe hybrid and it did not come with a map dvd for the navigation. The dealer I bought the vehicle from got me a disc part#25974486U which is compatible with 07+ tahoes but it would not work. It keeps saying, "disc installed is not a map data dvd". So I went to the Chevrolet dealer and bought a brand new 2011 disc, part #20940248 and it did the same thing. How rare is it for the reader to go bad on these things?

I hope this is an easy fix as I would love to have my navigation function.

Thanks so much


2008 Chevrolet Tahoe hybrid 4x4

 

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If you have any additional questions, please feel free to contact me.

Louis
GM Customer Service

 

My nav is saying the same message and I bought a new gm nav cd as well with no luck. The dealership would like to replenish the whole thing. How do you clean the reader? Is there any other tips or tricks as this happened while the dealer purged the def fluid and cleared the code on obd2. Any help would be greatly appreciated.