2026 Cadillac XT5 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

11 Coolant / Antifreeze parts for the 2026 Cadillac XT5 come from 3 brands — PRESTONE, VALVOLINE and ACDELCO. The "Popular" part is PRESTONE AF2100. Every part fits both the 2.0L L4 Turbocharged and the 3.6L V6.

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 2 options from PRESTONE and VALVOLINE — the catalog's value-priced group. PRESTONE AF3100 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 supplies 2 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 and ACDELCO supply 5 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 2026 Cadillac XT5 come from GM GENUINE.

Part numbers include GM GENUINE 55487843, GM GENUINE 55487839 and GM GENUINE 12653191, among others listed above.

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

8 Coolant Hose / Pipe parts for the 2026 Cadillac XT5 come from GM GENUINE. The "Popular" part is GM GENUINE 55509175.

Listed part numbers: GM GENUINE 55509175, GM GENUINE 84982181 and GM GENUINE 55487844, plus the other parts above.

This table covers the Coolant Hose Connector flanges. Read more

This group shows a single part: GM GENUINE 23333192.

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

2 Coolant Hose Retainer / Clip parts for the 2026 Cadillac XT5 come from GM GENUINE. 1 part fits every engine; the other 1 is engine-specific.

Part numbers include GM GENUINE 11548672 and GM GENUINE 15041309.

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

One part is listed for the 2026 Cadillac XT5 — GM GENUINE 23386455.

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

One part is listed for the 2026 Cadillac XT5 — GATES 31569.

This table covers the Hose clamps. Read more

13 Hose Clamp parts for the 2026 Cadillac XT5 come from GM GENUINE. The "Popular" part is GM GENUINE 90572594. 5 parts fit every engine; the other 8 are engine-specific.

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

2 Intercooler parts for the 2026 Cadillac XT5 come from 2 brands — GM GENUINE and TYC.

Part numbers include 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

4 Radiator parts for the 2026 Cadillac XT5 come from 3 brands — GM GENUINE, CSF and TYC.

This group includes CSF 3817, GM GENUINE 85557761 and GM GENUINE 85797937 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

This group shows a single part: ACDELCO RC124.

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

One part is listed for the 2026 Cadillac XT5 — GM GENUINE 23444086.

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

5 Radiator Fan Assembly parts are listed for the 2026 Cadillac XT5, from GM GENUINE and TYC.

This group includes GM GENUINE 86578076, GM GENUINE 86578077 and GM GENUINE 86578078 and the remaining 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

10 Radiator Hose parts are listed for the 2026 Cadillac XT5, from ACDELCO, GATES and GM GENUINE. ACDELCO 84006779 carries the "Popular" badge. 4 parts fit every engine; the other 6 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 2026 Cadillac XT5.

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

6 Temperature Sender / Sensor parts for the 2026 Cadillac XT5 come from 2 brands — HOLSTEIN and GM GENUINE. The "Popular" part is GM GENUINE 55488246. 2 parts fit every engine; the other 4 are engine-specific.

The Economy section: 3 options from HOLSTEIN. HOLSTEIN 2CTS0331 is listed in this group.

Standard Replacement: 3 parts, from GM GENUINE. A representative part number is GM GENUINE 55488246.

Listed part numbers: GM GENUINE 55488246, HOLSTEIN 2CTS0331 and HOLSTEIN 2CTS0330, 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

2 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 2026 Cadillac XT5 come from GM GENUINE.

Part numbers include GM GENUINE 12647181 and GM GENUINE 12623519.

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

2 Thermostat Housing / Water Outlet parts are listed for the 2026 Cadillac XT5, from GATES and GM GENUINE.

Listed part numbers: GATES CO35087 and GM GENUINE 12741009.

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

2 Water Inlet Gasket parts for the 2026 Cadillac XT5 come from GM GENUINE.

Part numbers include GM GENUINE 55504553 and GM GENUINE 12647400.

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

4 Water Pump parts are listed for the 2026 Cadillac XT5, from GM GENUINE and GATES.

This group includes GATES 43326, GM GENUINE 12738953 and GM GENUINE 13551856 and the remaining parts above.

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

This group shows a single part: GM GENUINE 2512072.

This table covers the Water Pump Inlet tubes. Read more

One part is listed for the 2026 Cadillac XT5 — 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 2026 Cadillac XT5.

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