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09-29-2008, 08:06 PM #1
- Join Date
- Sep 2008
Upgrading to GPS in 07'' Silverado
I have an 07' Silverado with OnStar. I was told it was XM ready but did not have the correct module in it. I want to instal a GPS navigation in it but would like to stay with a stock set up. I have found a few take out models from other Silverado's as well as other SUV units. Can someone tell me what additional I would need to purchase to instal one of these take out units? I.E. gps antenna, wiring harnes, etc.
The GM part number on the unit I am looking at is #25797978.
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