My question is what navigation unit can I put in my truck that will work replacing my current one came with it. I have onstar and phone and all that stuff but would like to add the navigational DVD unit in place of the radio that I have. Ebay shows lots of different part numbers and i'm not sure which one will work in my truck or do they all work? Any help?
Thanks, Bart

 

https://chevroletforum.com/m_5604/mpage_1/key_/tm.htm

Try this! For what it is worth...there have been a lot of guys do it, but the cost seems to be around 900.00-1200 when it is all said and done. You can get a nice aftermarket with Bluetooth, NAV, DVD, Ipod, SD card, USB... for 800.00-1400.00. Good luck