The constraints that GM puts on these trucks can vary from week to week, and a dealer is only allotted X number of trucks in a specific trim level, with some trim levels not even being available to said dealer. It’s like a maze trying to figure out how to order a decently equipped truck right now. I have seen the constraints on their order guide recently.
Example: mine was ordered in April, at which time you could not get leather in a LT, nor frt and rear parking sensors. It will get conv 1, bucket seats, spray in bedliner, skid plates, roof lights, power fold heated mirrors and 20in wheels/tires. I’ll add aftermarket leather at the dealer (it wears better than factory leather anyway) but other than that it has everything I want and nothing I don’t. I’ve got parking sensors and blind spot detection on my current truck and while they are sometimes good features, the parking sensors go crazy when driving in the rain and have to be turned off.
It will be almost exactly 12 weeks from order placement to delivery at the dealer on mine.