I'm waiting on my wife's Tahoe that I ordered in January. It was shipped on March 8th and still on a train according to Chevrolet. I didn't know it would take 3 weeks to get from Texas to Jacksonville, FL. The estimated delivery date to dealer was yesterday (3/25/21). I talked to the dealer and he said ETA still shows yesterday.
Update: Now GM is saying 4/8/21 on the Tahoe.
I am waiting on a AT4 to come in with 3.0 diesel, thought about trading in my HC with 6.2 for it. It should be in 4/12/21 according to GM. I'll make that decision when it comes in and I can put my hands on it.