'04 Tahoe LT and Navigation

Just bought Tahoe LT and need to add navigaton with 3D capability(software). Have been looking into Pioneer AVIC-N1, but not sure who in LA area has experiance with Tahoe '04 and N1 model. If better models exists out there, then I'll look into that also. Thanks in advance.

you also have the eclipse avn2454

I looked at both of those units for my LT & ended up with the Kenwood ddx-2015 double din unit. It fills the double din of your stock radio & you won't have to deal with the flip out issues such as wear & tear as well as moving the shifter all the time to allow the avic-n1  open.  I also feel Kenwoods navigation & build quality to be far superior to the eclipse.  Kenwood now packages the ddx-2015 with the 4100 nav system together for about the same price($2000)as the pioneer. I've installed many Avic's & they are nice, but it is a drawback to have to pull the nav dvd all the time when you want to watch a movie.