1- 1999 throttle body assembly 3950- USA OEM, for parts or repair, no warranty, no returns  Throttle body assembly being sold as is for repair as it has a Broken screw in AI sensor- as shown and pointed out in the pictures.  Geniune Throttle Body Valve Silverado 1999 1500 5.3L. please see pictures and product details. All pictures are of the actual product for auction or sale. All orders are shipped within one business day. Thank You for your business consideration.