Just had the same issue today for the first time.
2020 LTZ 1500 with 7500 miles,
Started the truck and the radio came on but the screen was black, tried restarting the truck and the screen remained black and the radio stopped working. Drove for about 15 minutes and both came back on.
I was hitting the garage door with the antenna with just the standard height truck.
I bought this one, and other then height it appears to be the same as factory.
https://smile.amazon.com/gp/product/B00SLMGVUW/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
John K
I did not expect to see the MPG numbers that are being posted for the 6.2.
I have a 5.3, Crew Cab Short Bed, LTZ, with Z-71 and highway driving 70 I get around 23 MPG. In the city I have been getting around 19 MPG. The best 50 mile results were 30.1 but that was perfect conditions and don't see anywhere near that normally.
John K
They have a 28.3 gallon tank for the 1500's, it is only available in the Regular Cab with the 8 foot bed. Don't now if it will fit in any of the others.
John K