Brand new to the forum, but I would like to see if someone could assist me with the correct build up for TIS & Tech-2 before I take my Tahoe in to the dealership. I don't want to waste time or money with a tech who doesn't know what he is doing. The navigation unit has been installed and I have also installed the Navigational Antenna, the VSS kit and the Voice Commands cable to the OnStar module as well. Right now, my Nav powers up and I have the pretty blue "TheftLock" screen. I have a 2007 Tahoe LT3 with the following equipment:

• No back up camera
• Has the rear seat dvd entertainment package
• Vehicle is equipped with OnStar
• Navigation head unit number is #15940102
• Has Bose speakers, but no y/91, as it's a Tahoe LT3

Can someone help me with this? I have read and heard horror stories of others who take their rig into the dealership, only to have some idiot try and program it incorrectly. Thanks in advance!

 

Welcome to the Chevrolet Forum. Have you read this thread: https://chevroletforum.com/forum/tahoe-suburban-25/unlocking-nav-after-installation-20590/

 

I took it into the dealer today with the directions and it worked like a charm. Dealer only charged me 40 dollars too! Very cool! Thanks for your help Shark!!

 

I wish I were in your shoes. I am still trying to get my unit working. I have almost the identical setup as you do (Suburban, not Tahoe, nav unit #25797978), but the dealership I took it to could not get it going. After $200, my nav unit is sitting on my kitchen counter!