I know that there was a "Special Edition" package that was briefly offered by the factory. Our local dealer had two 07 models on the lot last summer with that set up. Both Tahoe's were LT1 trucks. I noticed that the special package had a LTZ chrome grill and 20" rims, but no leather or chrome on the mirrors or handles. They both listed around $41,000.
1LT SPECIAL EDITION, includes (ASF) head curtain side-impact air bags, (CJ2) dual-zone automatic climate control, (JF4) power-adjustable pedals, (AW2) 2-passenger, third row 50/50 split-bench seat with Custom Cloth, (V22) bright chrome grille insert, (UD7) Rear Parking Assist and (RCS) 20" polished aluminum wheels Not available with (CJ3) dual-zone automatic climate control, (P46) 17" 5-spoke aluminum wheels or (RCP) 20" painted aluminum wheels. (AS3) 3-passenger, third row 50/50 split-bench seat with Custom Cloth is available as an upgrade for (AW2) 2-passenger, third row 50/50 split-bench seat with Custom Cloth.) (1LT Special Edition no longer available to order for the 2007 Model Year.