The 1991 Cutlass Calais Owners Manual contains an error on page 18 under the column headed "Split Fold Down Rear Seat (Option)". The entire second paragraph should be replaced with the following information:
The AM9 Split-Folding Rear Seat Back on all 1991 Oldsmobile Cutlass Calais models have an internal locking system design, which allows the seat back to be folded down from the passenger compartment side or the trunk side. The seat back lock will engage only when the vehicle decelerates beyond a specific rate.
General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.