Used motor mount.  This is the rubber insert and the bracket that mounts to the engine block.  Fits either side (LH or RH) on engine.  Sold individually, as shown.  Fits the following:

07-10 5.3L/6.0L/6.2L Avalanche/Suburban/Tahoe/Yukon 2WD

The item in the picture is the actual photo of the item being sold.