One problem related to gas recirculation valve (egr valve) has been reported for the 2000 Cadillac Deville. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2000 Cadillac Deville based on all problems reported for the 2000 Deville.
Motor mount broke, which caused the engine to move and rupture the air conditioning system. Left steering tie rod was worn almost to a point of failure. Cadillac felt the consumer was entitled to reimbursement, so they sent him a check for $585. 65 to offset to some degree the failure caused.