OnStar requires update due to 3G end of life

joebedford wrote:
I was wondering if anybody has had the update to their TV to handle 4G? My Silverado required a hardware change from 2G to 3G but apparently the change to 4G is "over the air". Haven't driven the truck in the last two years but I'm thinking about it now.

My 2015.5 Denali came with 4G, no need to have the over the air update. but different models had different switchover dates to 4G

My understanding is that if the vehicle needs the "over the air update" to 4g it should be transparent to the user, and likely has already happened.