2021 Cadillac XT6 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 XT6 come from 6 brands — PRESTONE, PEAK, VALVOLINE and 3 other brands. The "Popular" part is FVP MV5050GAL. 13 parts fit every engine; the other 4 are engine-specific.

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

4 Coolant Air Bleed Hose / Pipe parts for the 2021 Cadillac XT6 come from GM GENUINE.

Listed part numbers: GM GENUINE 55487843, GM GENUINE 55487839 and GM GENUINE 12653191, plus the other parts above.

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

9 Coolant Hose / Pipe parts for the 2021 Cadillac XT6 come from 2 brands — GM GENUINE and ACDELCO. The "Popular" part is GM GENUINE 55509175.

Part numbers include GM GENUINE 55509175, GM GENUINE 55487844 and ACDELCO 84863051, among others listed above.

This table covers the Coolant Hose Connector flanges. Read more

2 Coolant Hose Connector / Flange parts for the 2021 Cadillac XT6 come from 2 brands — FOUR SEASONS and GM GENUINE.

Part numbers include FOUR SEASONS 86373 and GM GENUINE 23333192.

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

2 Coolant Hose Retainer / Clip parts for the 2021 Cadillac XT6 come from GM GENUINE. 1 part fits every engine; the other 1 is engine-specific.

This group includes GM GENUINE 11548672 and GM GENUINE 15041309.

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

7 Coolant Reservoir parts are listed for the 2021 Cadillac XT6, from TECHPRO, DORMAN, GM GENUINE and 3 other brands. DORMAN 603861 carries the "Popular" badge. All of them fit every engine offered in the 2021 XT6.

Listed part numbers: DORMAN 603861, GM GENUINE 23386455 and GPD 2411160, plus the other parts 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

6 Coolant Reservoir Cap parts are listed for the 2021 Cadillac XT6, from DORMAN, SKP, AUTOTECNICA and 3 other brands. DORMAN 54218 carries the "Popular" badge. All of them fit every engine offered in the 2021 XT6.

Part numbers include DORMAN 54218, SKP SK54218 and AUTOTECNICA GM0714619, among others listed above.

This table covers the Hose clamps. Read more

13 Hose Clamp parts for the 2021 Cadillac XT6 come from GM GENUINE. The "Popular" part is GM GENUINE 90572594. 3 parts fit every engine; the other 10 are engine-specific.

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

2 Intercooler parts for the 2021 Cadillac XT6 come from 2 brands — GM GENUINE and TYC.

Listed part numbers: GM GENUINE 85557764 and TYC 18150.

This table covers the Intercooler Air Hose pipes. Read more

This group shows a single part: GM GENUINE 84157174.

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

12 Radiator parts for the 2021 Cadillac XT6 come from 9 brands — GM GENUINE, UAC, TECHPRO and 6 other brands. The "Popular" part is GM GENUINE 85797937.

The Economy section: 1 option from TECHPRO. TECHPRO GM3010589 is listed in this group.

Standard Replacement: 2 parts, from GM GENUINE and UAC. A representative part number is GM GENUINE 85557761.

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

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 for the 2021 Cadillac XT6 come from 2 brands — ACDELCO and PROFESSIONAL PARTS SWEDEN. Every part fits both the 2.0L L4 Turbocharged and the 3.6L V6.

Part numbers include ACDELCO RC124 and PROFESSIONAL PARTS SWEDEN 21342353.

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

One part is listed for the 2021 Cadillac XT6 — GM GENUINE 23444086.

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

11 Radiator Fan Assembly parts are listed for the 2021 Cadillac XT6, from GM GENUINE, UAC, GPD and 4 other brands. FOUR SEASONS 75197 carries the "Popular" badge. 1 part fits every engine; the other 10 are engine-specific.

Economy: 3 parts, from GPD, TECHPRO and VARIOUS MFR. A representative part number is GPD 2812298.

The Standard Replacement section: 8 options from GM GENUINE, UAC, FOUR SEASONS and 1 other brand. FOUR SEASONS 75197 is listed in this group.

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

12 Radiator Hose parts are listed for the 2021 Cadillac XT6, from ACDELCO, GATES, GM GENUINE and 1 other brand. ACDELCO 23253702 carries the "Popular" badge. 1 part fits every engine; the other 11 are engine-specific.

This table covers the seals at the Radiator. 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

GM GENUINE supplies the 4 Radiator Seal parts for the 2021 Cadillac XT6.

Listed part numbers: GM GENUINE 84672585, GM GENUINE 84672586 and GM GENUINE 23100851, plus the other 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

9 Temperature Sender / Sensor parts for the 2021 Cadillac XT6 come from 6 brands — GM GENUINE, STANDARD MOTOR PRODUCTS, GPD and 3 other brands. The "Popular" part is GM GENUINE 55488246. 4 parts fit every engine; the other 5 are engine-specific.

The Economy section: 1 option from GPD. GPD 1814556 is listed in this group.

Standard Replacement: 8 parts, from GM GENUINE, STANDARD MOTOR PRODUCTS, FACET and 2 other brands. A representative part number is GM GENUINE 55488246.

Listed part numbers: GM GENUINE 55488246, GPD 1814556 and GM GENUINE 55497116, plus the other parts above.

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

6 Thermostat parts are listed for the 2021 Cadillac XT6, from MOTORAD and FOUR SEASONS.

The Heavy Duty section: 1 option from MOTORAD. MOTORAD 5860203 is listed in this group.

The Standard Replacement section: 3 options from MOTORAD and FOUR SEASONS. FOUR SEASONS 86343 is listed in this group.

2 ungrouped parts are not assigned to a grade, with the same engine-level match.

Listed part numbers: MOTORAD 5860203, FOUR SEASONS 86343 and MOTORAD 860203, plus the other parts above.

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

5 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 2021 Cadillac XT6 come from 4 brands — GM GENUINE, ELRING, FEL-PRO and 1 other brand. The "Popular" part is GM GENUINE 12623519.

Listed part numbers: GM GENUINE 12623519, ELRING 048290 and FEL-PRO 36165, plus the other parts above.

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

4 Thermostat Housing / Water Outlet parts are listed for the 2021 Cadillac XT6, from SKP, MOTORAD, GATES and 1 other brand.

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.

2 ungrouped parts are not assigned to a grade, with the same engine-level match.

This group includes SKP SKCH1111, MOTORAD CH1111 and GATES CO35087 and the remaining parts above.

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

4 Water Inlet Gasket parts for the 2021 Cadillac XT6 come from 3 brands — GM GENUINE, FEL-PRO and MAHLE / CLEVITE.

Listed part numbers: FEL-PRO 36167, GM GENUINE 55504553 and GM GENUINE 12647400, plus the other parts above.

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

9 Water Pump parts are listed for the 2021 Cadillac XT6, from GM GENUINE, FVP, US MOTOR WORKS and 2 other brands. GATES 43326 carries the "Popular" badge.

Economy: 2 parts, from FVP and US MOTOR WORKS. A representative part number is FVP US8148.

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: 5 options from GM GENUINE, GATES and GMB. GATES 43326 is listed in this group.

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

Listed part numbers: GATES 43326, FVP US8148 and GM GENUINE 12738953, plus the other 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 XT6 — GM GENUINE 55497659.

This table covers the gaskets between the water pump and the block or housing. 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

3 Water Pump Gasket parts for the 2021 Cadillac XT6 come from 3 brands — ELRING, FEL-PRO and GM GENUINE.

Part numbers include ELRING 237160, FEL-PRO 36153 and GM GENUINE 2512072.

This table covers the Water Pump Inlet tubes. Read more

One part is listed for the 2021 Cadillac XT6 — GM GENUINE 12706857.

This table covers the Water Pump pulleys. Typical signs include a growl or chirp that follows engine speed, or a pulley that will not spin freely by hand. Spin each pulley with the belt off. Roughness or play means replace it with the belt. Read more

This group shows a single part: GM GENUINE 12652047.

This table covers the Water Pump Seal O-rings. Typical signs include a seep at a fitting or a housing that weeps after a service. Lube the new O-ring with the fluid it will see, and do not roll it into the groove. Read more

GM GENUINE supplies the 3 Water Pump Seal / O-Ring parts for the 2021 Cadillac XT6.

Part numbers include GM GENUINE 12646951, GM GENUINE 12646952 and GM GENUINE 12649987.