Get the Spectra 2491 radiator from RockAuto. Look at the RPO sticker under the spare tire cover to make sure the car does not have the V03 HD Cooling option. Otherwise it doesn't matter if the car is the base, DHS, or DTS trim level. (The UltraPower 2491 is the same radiator)
If you want, do a cylinder block exhaust gas test. Rent the tester at any parts store. That will tell you if the head gasket is bad due to failing cylinder block head bolt hole threads. Follow the instructions and don't try to "make it better".
These radiator plastic end tanks crack over time. Even if the system was overpressurized by leaking exhaust gas the surge tank cap will vent off pressure at the 18 psi set point. A "leaky head gasket" win not normally blow up a radiator. Catastrophic sudden total gasket failure - maybe. Pissy slow leak - no. The "head gasket" overheat comes when there's enough coolant loss to cause the water pump to lose flow - then the engine overheats and goes into Camel Mode.
2002 CADILLAC DEVILLE 4.6L V8 Radiator | RockAuto
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If you want, do a cylinder block exhaust gas test. Rent the tester at any parts store. That will tell you if the head gasket is bad due to failing cylinder block head bolt hole threads. Follow the instructions and don't try to "make it better".
These radiator plastic end tanks crack over time. Even if the system was overpressurized by leaking exhaust gas the surge tank cap will vent off pressure at the 18 psi set point. A "leaky head gasket" win not normally blow up a radiator. Catastrophic sudden total gasket failure - maybe. Pissy slow leak - no. The "head gasket" overheat comes when there's enough coolant loss to cause the water pump to lose flow - then the engine overheats and goes into Camel Mode.
