Only the very earliest had the hardware but it was not active in the tune, those engines built prior to April 2005. The Tahoe, Yukon and Escalade went on sale in January 2006, the Tahoes started production in December 2005 at Arlington, the Yukon in Janesville and the Escalade started in January 2006 at Arlington. The Suburban, Yukon XL and Escalade ESV all began being built in March 2006 at Janesville, Silao and Arlington respectively.
So, only the very earliest Yukon Denalis and Escalades might see an L92 with AFM hardware but not active. Over at Performance Trucks forum about a year or so ago, there was a fella with one such motor.