One problem related to rear seat belt has been reported for the 2001 Cadillac STS. The most recently reported issues are listed below.
The caller does not have a defect in vehicle. He has a complaint about the design of the back seat belt. He caller said that when he put grandchild, who is handicapped, in the child seat and tried to use the seat belt it would not stay tight. The problem was getting worse because the child was getting bigger and heavier. The caller said it was not a ratchet seat belt system. Dealer and manufacturer said there was nothing they could do for free. He was told they do not make the ratchet seat belt system for that vehicle.