Unless you are wanting a unicorn of a Sierra, I'd think you could find one on the lot vs ordering. Now if they are saying a Sierra order is only 4-6 weeks out, have at it
This isn't your normal dealer, but they have over 150 Sierras on the lot
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What I'm seeing is consistent with that. The dealers usually have 30 1/2 ton pickups for every 1 full size 3 row SUV.
The reason I wanted a 1/2 ton based full size SUV was to tow a track car on a flatbed trailer. If I end up up with a 1/2 ton pickup, I may not need a 1/2 ton based full size SUV and a unibody 3 row full size SUV like a Jeep Grand Cherokee L would suffice 3-5 years down the road to replace my existing SUV.