2008 and Nav Radio

[CCMDoc]

Originally Posted by H3 Builder

No, 08 started out with the new module unless it came with a Nav. unit from the factory. The test fleet of 2008 preproduction units had this problem, after a while, that is why we had a hold on Nav radios for 08. They came off hold first of August when we recieved in the older ONSTAR units. It won't happen right away, but when it does, you'll know why. The ONSTAR for non Nav. units is alot stronger than previous years, and it and the Nav antenna make a electronic field that disables the Nav radio. A possible fix is to move the Nav. antenna under the dash. The only problem with that is there is only so much window room for the antenna to pick up. That is why they went with the lower powered ONSTAR unit.

In your experience and that of the others with the test fleet, how long to see this problem surface? I have had the truck about 2 months and still all seems well.
Also, the nav antenna is currently under the dash near the windshield to the left of the center air vents (stock location). You mention moving it under the dash - anyplace in particular fi I should see the problem develop?
Thanks