Additional features of this seat. These 45 " suv 3rd seats was especially designed for the Trailblazer - Envoy. This seat is made to face to the rear and 2 lap seat belts are included. There is ample room to accommodate 2 children in these suv seats. Drilling is required for installation. With the included detailed instruction most find this installation as not difficult to do in about an 2 hours. Standard and factory sew patters are available on these trailblazer - Envoy suv 3rd seats.