1995 Buick Riviera Owner's Manual - Page 191

Rear Towing Hookups TOW LIMITS 55 MPH (88 KM/H.), 500 MILES (800 KM) Attach "T" hook chains to the slots in the bottom of the on floor panjust ahead of the rear wheels both sides. Position the lower sling crossbar directly under the fascia. A 4" x 4" wood beam is not needed. Attach a separate safety chain around the outboard end of each lower control arm.