 Because the twins Cadillac Escalade EXT was not in production at  the time of the movies filming, General Motors had to graft  together fiberglass Cadillac parts with prototype Chevrolet  Avalanche pickup trucks, to create the black truck seen in the  freeway chase. The Lincoln Continental from  _Matrix, The (1999)_ (qv) makes a brief cameo appearance toward the  beginning of the film. The underground garage where the characters  select a car is populated with all Cadillacs, including a classic  1950s El Dorado and prototype of the 2004 XLR.