2004 Buick LeSabre Owner's Manual - Page 46

To assist you in locating the lower anchors for this child restraint system, each seating position with the LATCH system has a label on the seatback at each lower anchor position. The labels are located near the base of all three rear seating positions. In order to use the LATCH system in your vehicle, you need a child restraint designed for that system. 1-40