One problem related to engine belts and pulleys has been reported for the 1999 Cadillac Deville. The most recently reported issues are listed below.
The contact owns a 1999 Cadillac Deville. The contact stated that the gauge temperature reading was extremely high when the vehicle was first started. The vehicle was taken to an independent mechanic. The mechanic replaced the water pump, heater fan switch, thermostat and serpentine belt. The failure continued after the repairs. The vehicle was not further repaired. The approximate failure mileage was 169,400.