2000 Cadillac DeVille Owner's Manual - Page 296

Storing the Spare Tire and Tools CAUTION: Storing a jack, a tire or other equipment in the passenger compartment of the vehicle could cause injury. In a sudden stop or collision, loose equipment could strike someone. Store all these in the proper place. The compact spare is for temporary use only. Replace the compact spare tire with a full-size tire as soon as you can. See "Compact Spare Tire" in the index. Check the storage instructions label for information on how to properly position and store the compact spare tire. 5-29