2004 Cadillac CTS Cooling System Parts

This table covers the engine coolants and antifreeze formulations specified for this cooling system. Typical signs include a rising temperature gauge, rusty or sludged coolant, or a heater that blows cold. Use the chemistry named in the notes. Mixing silicate, OAT and HOAT formulas can gel in the radiator. Read more

17 Coolant / Antifreeze parts are listed for the 2004 Cadillac CTS, from PRESTONE, VALVOLINE, PEAK and 3 other brands. FVP MV5050GAL carries the "Popular" badge. 16 parts fit every engine; the other 1 is engine-specific.

The Compatible With All Colors section lists 1 option from PRESTONE — grouped under the catalog's "Compatible With All Colors" designation — the notes column spells out what sets them apart. PRESTONE AF3055 is listed in this group.

In the Economy grade, FVP, PEAK, PRESTONE and 1 other brand supply 4 parts: the catalog's value-priced group. A representative part number is FVP MV5050GAL.

The Premium section lists 4 options from PRESTONE and PEAK — a step above OE specification in materials, tolerances or warranty terms. PRESTONE AF2100 is listed in this group.

The Standard Replacement section lists 8 options from VALVOLINE, PRESTONE, ACDELCO and 2 other brands — built to original-equipment specification. ACDELCO 105027 is listed in this group.

This table covers the hard pipes and extra hoses in the coolant circuit. Read more

4 Coolant Hose / Pipe parts are listed for the 2004 Cadillac CTS, from DAYCO, CONTINENTAL and DORMAN.

Economy: 1 part, from CONTINENTAL. A representative part number is CONTINENTAL 50277.

The Standard Replacement section: 3 options from DAYCO and DORMAN. DAYCO 88438 is listed in this group.

Listed part numbers: CONTINENTAL 50277, DAYCO 88438 and DAYCO 87750, plus the other parts above.

This table covers the seals at the Coolant Hose / Pipe. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again. Read more

6 Coolant Hose / Pipe Seal parts for the 2004 Cadillac CTS come from 4 brands — ELRING, GM GENUINE, DORMAN and 1 other brand. 2 parts fit every engine; the other 4 are engine-specific.

This group includes DORMAN 56390, ELRING 943630 and ELRING 868630 and the remaining parts above.

This table covers the seals at the Coolant Hose Connector / Flange. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again. Read more

This group shows a single part: ELRING 943020.

This table covers the gaskets that seal the Coolant Pipe. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for. Read more

This group shows a single part: AJUSA 01154600.

This table covers the overflow / expansion tanks that hold extra coolant. Read more

3 Coolant Reservoir parts for the 2004 Cadillac CTS come from 2 brands — TECHPRO and DORMAN. Every part fits all 3 engine options (3.2L V6, 3.6L V6 and 5.7L V8).

This group includes DORMAN 603099, TECHPRO GM3014158 and TECHPRO GM3014159.

This table covers the caps on the overflow / expansion tank. Typical signs include a leak at the neck, a cap that will not hold pressure, or a missing tether. Match the pressure rating or thread in the notes — radiator, reservoir and fuel caps are not interchangeable. Read more

This group shows a single part: MOTORAD T46.

This table covers the Coolant Water Crossover Mounting sets. Read more

3 Coolant Water Crossover Mounting Set parts are listed for the 2004 Cadillac CTS, from FEL-PRO, MAHLE / CLEVITE and VICTOR REINZ.

This group includes FEL-PRO ES73027, MAHLE / CLEVITE GS33845 and VICTOR REINZ 181002301.

This table covers the Cooling Fan control modules. Read more

2 Cooling Fan Control Module parts for the 2004 Cadillac CTS come from US MOTOR WORKS. Every part fits all 3 engine options (3.2L V6, 3.6L V6 and 5.7L V8).

This group includes US MOTOR WORKS 16789 and US MOTOR WORKS 16795.

This table covers the adapters used to pressure-test this cooling system. Read more

4 Cooling System Tester Adapter parts are listed for the 2004 Cadillac CTS, from GATES and MOTORAD. All of them fit every engine offered in the 2004 CTS.

Listed part numbers: GATES 31431, GATES 31391 and MOTORAD 3128, plus the other parts above.

This table covers the Hose clamps. Read more

One part is listed for the 2004 Cadillac CTS — GM GENUINE 11518519.

This table covers the radiators that dump engine heat to airflow through the core. Typical signs include overheating in traffic, a wet core, or coolant that disappears with no puddle. Replace the cap if it cannot hold the rated pressure, and bleed the system after the swap. Read more

19 Radiator parts are listed for the 2004 Cadillac CTS, from GPD, DENSO, KOYORAD and 9 other brands. ULTRA-POWER 2731 carries the "Popular" badge.

Economy: 4 parts, from GPD, ULTRA-POWER and FAMOUS BRAND. A representative part number is ULTRA-POWER 2731.

The Standard Replacement section: 15 options from DENSO, KOYORAD, FVP and 6 other brands. CSF 3571 is listed in this group.

This table covers the caps that hold system pressure at the radiator or reservoir neck. Typical signs include a leak at the neck, a cap that will not hold pressure, or a missing tether. Match the pressure rating or thread in the notes — radiator, reservoir and fuel caps are not interchangeable. Read more

2 Radiator Cap parts are listed for the 2004 Cadillac CTS, from ACDELCO and GATES. All of them fit every engine offered in the 2004 CTS.

Listed part numbers: ACDELCO RC116 and GATES 31532.

This table covers the fan assemblies (and clutches, where listed) that pull air through the radiator. Read more

14 Radiator Fan Assembly parts for the 2004 Cadillac CTS come from 7 brands — TECHPRO, DORMAN, TYC and 4 other brands. The "Popular" part is DORMAN 621101.

The Economy section: 6 options from TECHPRO, DORMAN and GPD. DORMAN 621101 is listed in this group.

Standard Replacement: 8 parts, from TYC, FOUR SEASONS, UAC and 1 other brand. A representative part number is TYC 623390.

This table covers the Radiator Fan motors. Typical signs include no motion, a squeal, or a motor that only runs on one speed. Confirm power, ground and the control module before replacing the motor. Read more

One part is listed for the 2004 Cadillac CTS — GPD 2312106.

This table covers the upper, lower and connecting hoses between radiator, engine and reservoir. Typical signs include swelling, cracks, a soft spot, or a leak at a clamp. Replace adjacent aged hoses while the system is drained — they share the same heat cycle. Read more

20 Radiator Hose parts for the 2004 Cadillac CTS come from 4 brands — ACDELCO, CONTINENTAL, GATES and 1 other brand. The "Popular" part is ACDELCO 20417S.

This table covers the Radiator Upper Air Baffle retainers and clips. Read more

5 Radiator Upper Air Baffle Retainer / Clip parts for the 2004 Cadillac CTS come from DORMAN. The "Popular" part is DORMAN 700579. 2 parts fit every engine; the other 3 are engine-specific.

This group includes DORMAN 700579, DORMAN 961359 and DORMAN 700061 and the remaining parts above.

This table covers the senders that report coolant temperature to the gauge or ECU. Typical signs include a gauge that sits on empty or overheat, or a lamp that does not match what the engine is doing. Rule out the cluster and the wiring before replacing the sender. Read more

38 Temperature Sender / Sensor parts are listed for the 2004 Cadillac CTS, from STANDARD MOTOR PRODUCTS, HOLSTEIN, UNITED MOTOR PRODUCTS and 14 other brands. STANDARD MOTOR PRODUCTS TX89T carries the "Popular" badge. Economy, Full Service Kit and Standard Replacement are all represented, and Standard Replacement alone accounts for 25 parts.

This table covers the thermostats that open the coolant circuit at the specified temperature. Typical signs include slow warm-up, a gauge that climbs in traffic, or heat that never quite arrives. Replace the housing gasket with the thermostat and bleed the system so a trapped air pocket does not cook the new part. Read more

37 Thermostat parts for the 2004 Cadillac CTS come from 11 brands — MOTORAD, DORMAN, GATES and 8 other brands. The "Popular" part is GATES 33911. Economy, Heavy Duty, Performance, Premium and Standard Replacement are all represented, and Standard Replacement alone accounts for 28 parts.

This table covers the seals at the thermostat housing and water outlet. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again. Read more

35 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 2004 Cadillac CTS, from FEL-PRO, MAHLE / CLEVITE, APEX and 4 other brands. FEL-PRO 35858 carries the "Popular" badge. The notes list position, dimensions and spec qualifiers wherever the manufacturer distinguishes between variants.

This table covers the housings and outlets the thermostat sits in. Read more

10 Thermostat Housing / Water Outlet parts for the 2004 Cadillac CTS come from 7 brands — FAMOUS BRAND, GPD, FOUR SEASONS and 4 other brands. The "Popular" part is MOTORAD CH2836.

The Economy section: 5 options from GPD, AUTOTECNICA, DORMAN and 1 other brand. AUTOTECNICA GM0718508 is listed in this group.

Standard Replacement: 4 parts, from FOUR SEASONS, MOTORAD and FACET. A representative part number is MOTORAD CH2836.

1 further part sits outside the graded sections, with the same engine-level match.

This table covers the gaskets that seal the Water Inlet. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for. Read more

One part is listed for the 2004 Cadillac CTS — GM GENUINE 131169.