Looked at the pricing schedules today... it's true... the 10553 is toast. The L76/6.0L might be available with the NHT package on the crew cab 4x4 SLT/LTZ models. And you can only get the L9H/6.2L on a crew cab SLT/LTZ. First glance it looks like everything else is stuck with a 5.3L. Makes me glad I got my 6.0.