2021 Cadillac XT4 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 for the 2021 Cadillac XT4 come from 6 brands — PRESTONE, PEAK, VALVOLINE and 3 other brands. The "Popular" part is FVP MV5050GAL.

In the Compatible With All Colors grade, PRESTONE supplies 1 part: grouped under the catalog's "Compatible With All Colors" designation — the notes column spells out what sets them apart. A representative part number is PRESTONE AF3055.

The Economy section lists 4 options from FVP, PEAK, PRESTONE and 1 other brand — the catalog's value-priced group. FVP MV5050GAL is listed in this group.

In the Heavy Duty grade, PRESTONE supplies 1 part: rated for severe service. A representative part number is PRESTONE AFC12100.

In the Premium grade, PRESTONE and PEAK supply 4 parts: a step above OE specification in materials, tolerances or warranty terms. A representative part number is PRESTONE AF2100.

In the Standard Replacement grade, VALVOLINE, PRESTONE, ACDELCO and 2 other brands supply 7 parts: built to original-equipment specification. A representative part number is ACDELCO 105027.

This table covers the Coolant Air Bleed Hose pipes. Read more

3 Coolant Air Bleed Hose / Pipe parts for the 2021 Cadillac XT4 come from GM GENUINE.

Listed part numbers: GM GENUINE 55487843, GM GENUINE 55487839 and GM GENUINE 85165347.

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

4 Coolant Hose / Pipe parts for the 2021 Cadillac XT4 come from GM GENUINE.

Listed part numbers: GM GENUINE 55509175, GM GENUINE 55487844 and GM GENUINE 12745005, plus the other parts above.

This table covers the Coolant Hose retainers and clips. Read more

This group shows a single part: GM GENUINE 11548672.

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

7 Coolant Reservoir parts are listed for the 2021 Cadillac XT4, from TECHPRO, DORMAN, GM GENUINE and 3 other brands. DORMAN 603861 carries the "Popular" badge.

Part numbers include DORMAN 603861, GM GENUINE 23386455 and GPD 2411160, among others listed above.

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

5 Coolant Reservoir Cap parts are listed for the 2021 Cadillac XT4, from DORMAN, AUTOTECNICA, CALORSTAT and 2 other brands. DORMAN 54218 carries the "Popular" badge.

Listed part numbers: DORMAN 54218, AUTOTECNICA GM0714619 and CALORSTAT RC0144, plus the other parts above.

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

2 Cooling System Tester Adapter parts for the 2021 Cadillac XT4 come from MOTORAD.

Part numbers include MOTORAD 3128 and MOTORAD 3127.

This table covers the Hose clamps. Read more

13 Hose Clamp parts for the 2021 Cadillac XT4 come from GM GENUINE. The "Popular" part is GM GENUINE 90572594.

This table covers the intercoolers that cool turbo or supercharger charge air. Read more

4 Intercooler parts for the 2021 Cadillac XT4 come from 4 brands — TECHPRO, GM GENUINE, GPD and 1 other brand.

The Economy section: 1 option from TECHPRO. TECHPRO GM3012128 is listed in this group.

Standard Replacement: 1 part, from GM GENUINE. A representative part number is GM GENUINE 85606128.

2 further parts sit outside the graded sections, with the same engine-level match.

This group includes TECHPRO GM3012128, GM GENUINE 85606128 and GPD 2711568 and the remaining parts above.

This table covers the Intercooler Air Hose pipes. Read more

This group shows a single part: GM GENUINE 23273935.

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

5 Radiator parts for the 2021 Cadillac XT4 come from 5 brands — GPD, TECHPRO, GM GENUINE and 2 other brands. The "Popular" part is GM GENUINE 85141935.

The Economy section: 2 options from GPD and TECHPRO. GPD 13860C is listed in this group.

Standard Replacement: 3 parts, from GM GENUINE, OSC and UAC. A representative part number is GM GENUINE 85141935.

This group includes GM GENUINE 85141935, GPD 13860C and TECHPRO GM3010617 and the remaining parts above.

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

3 Radiator Cap parts for the 2021 Cadillac XT4 come from 3 brands — ACDELCO, GATES and PROFESSIONAL PARTS SWEDEN.

This group includes ACDELCO RC124, GATES 31569 and PROFESSIONAL PARTS SWEDEN 21342353.

This table covers the petcocks used to drain the radiator. Read more

2 Radiator Drain Petcock parts are listed for the 2021 Cadillac XT4, from ACDELCO and DORMAN.

Listed part numbers: ACDELCO 22985584 and DORMAN 61134.

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

4 Radiator Fan Assembly parts are listed for the 2021 Cadillac XT4, from TECHPRO and GM GENUINE.

Economy: 2 parts, from TECHPRO. A representative part number is TECHPRO GM3115343.

The Standard Replacement section: 2 options from GM GENUINE. GM GENUINE 84897501 is listed in this group.

Listed part numbers: TECHPRO GM3115343, TECHPRO GM3115352 and GM GENUINE 84897501, plus the other parts above.

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

ACDELCO supplies the 3 Radiator Hose parts for the 2021 Cadillac XT4.

Listed part numbers: ACDELCO 55487848, ACDELCO 85151094 and ACDELCO 85165353.

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

13 Temperature Sender / Sensor parts for the 2021 Cadillac XT4 come from 7 brands — HOLSTEIN, GM GENUINE, STANDARD MOTOR PRODUCTS and 4 other brands. The "Popular" part is GM GENUINE 55488246.

The Economy section: 4 options from HOLSTEIN and GPD. GPD 1814555 is listed in this group.

Standard Replacement: 9 parts, from GM GENUINE, STANDARD MOTOR PRODUCTS, WELLS and 2 other brands. A representative part number is GM GENUINE 55488246.

This table covers the Temperature Sender / Sensor clips. Read more

This group shows a single part: DORMAN 66264.

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

2 Thermostat parts are listed for the 2021 Cadillac XT4, from FOUR SEASONS and MOTORAD.

Listed part numbers: FOUR SEASONS 86363 and MOTORAD TA9127.

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

2 Thermostat Housing / Water Outlet parts are listed for the 2021 Cadillac XT4, from SKP and MOTORAD.

Economy: 1 part, from SKP. A representative part number is SKP SKCH1111.

The Standard Replacement section: 1 option from MOTORAD. MOTORAD CH1111 is listed in this group.

This group includes SKP SKCH1111 and MOTORAD CH1111.

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

This group shows a single part: GM GENUINE 55504553.

This table covers the pumps that circulate coolant through the block and radiator. Typical signs include coolant at the weep hole, pulley play, or a growl from the front of the engine. Replace the thermostat and refill with the specified coolant whenever the pump comes off. Read more

3 Water Pump parts are listed for the 2021 Cadillac XT4, from GM GENUINE, GMB and FVP.

In the High Volume / Pressure grade, GM GENUINE supplies 1 part: grouped under the catalog's "High Volume / Pressure" designation — the notes column spells out what sets them apart. A representative part number is GM GENUINE 12738953.

The Standard Replacement section: 1 option from GMB. GMB 1309080 is listed in this group.

1 ungrouped part is not assigned to a grade, with the same engine-level match.

This group includes GM GENUINE 12738953 and GMB 1309080 and the remaining parts above.

This table covers the brackets that mount the Water Pump. Typical signs include a cracked mount, a rattle, or a bracket that no longer holds alignment. Confirm position in the notes. Many brackets look alike and bolt to different corners. Read more

One part is listed for the 2021 Cadillac XT4 — GM GENUINE 55497659.