Our Jensen double-din in the dash worked for a couple of years. I tried to use the GPS, but found it to be very sub-standard excuse for the intended purpose. We don't listen to the radio or CD on the road as it's nearly impossible to appreciate the music in such a loud environment. Initially, the only real use it saw was as a 5V power supply for my handheld DeLorme PN-60.
About a year into ownership, I installed a pair of dual 1.2A USB ports in the lower dash fascia, so the need for the Jensen disappeared.
Last winter, I attempted to turn it on for some odd reason, and found it was completely dead. All fuses checked out ok, so something decided to quit in the head unit. The Chevy dash is not the easiest thing to open up, so there it sits - yet another example of fine ASA Electronics engineering.
If'n when I decide I want a replacement, it'll certainly be a quality brand.
I use a 5" Garmin on a ram mount at the far left of the dash, which has served me well over the years. Even if the in-dash unit had a good GPS setup, it would still be awkward to use owing to GM's dash design. (As much as I prefer GM over Ford, GM sorely needs to hire some decent UI engineers and have a lot better build quality...)
2016 Forest River Sunseeker 2250SLEC Chevrolet 6.0L