2019 Cadillac CT6 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

16 Coolant / Antifreeze parts for the 2019 Cadillac CT6 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 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

7 Coolant Air Bleed Hose / Pipe parts for the 2019 Cadillac CT6 come from GM GENUINE.

Listed part numbers: GM GENUINE 55487843, GM GENUINE 55494528 and GM GENUINE 55507887, plus the other parts above.

This table covers the bleeders used to purge air from the coolant circuit. Read more

One part is listed for the 2019 Cadillac CT6 — GM GENUINE 20876185.

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

8 Coolant Hose / Pipe parts for the 2019 Cadillac CT6 come from 2 brands — GM GENUINE and ACDELCO.

This group includes ACDELCO 55515456, GM GENUINE 55487348 and GM GENUINE 55487351 and the remaining parts above.

This table covers the Coolant Hose Connector flanges. Read more

This group shows a single part: FOUR SEASONS 86373.

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

One part is listed for the 2019 Cadillac CT6 — ELRING 237180.

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

This group shows a single part: GM GENUINE 11601844.

This table covers the Coolant Pipe adapters. Read more

One part is listed for the 2019 Cadillac CT6 — GM GENUINE 1534890.

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

GM GENUINE supplies both parts for the 2019 Cadillac CT6.

This group includes GM GENUINE 84023872 and GM GENUINE 22970513.

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

7 Coolant Reservoir Cap parts are listed for the 2019 Cadillac CT6, from DORMAN, SKP, AUTOTECNICA and 3 other brands. DORMAN 54218 carries the "Popular" badge.

This group includes DORMAN 54218, SKP SK54218 and AUTOTECNICA GM0714619 and the remaining parts above.

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

2 Cooling System Tester Adapter parts for the 2019 Cadillac CT6 come from MOTORAD.

Listed part numbers: MOTORAD 3128 and MOTORAD 3127.

This table covers the Hose clamps. Read more

10 Hose Clamp parts for the 2019 Cadillac CT6 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

5 Intercooler parts for the 2019 Cadillac CT6 come from 2 brands — GM GENUINE and GPD.

This group includes GM GENUINE 84418805, GM GENUINE 12698228 and GM GENUINE 12698229 and the remaining parts above.

This table covers the Intercooler Hose / Pipe clamps. Read more

One part is listed for the 2019 Cadillac CT6 — GM GENUINE 13438980.

This table covers the seals at the Intercooler. 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 both parts for the 2019 Cadillac CT6.

Listed part numbers: GM GENUINE 12701513 and GM GENUINE 12703587.

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 2019 Cadillac CT6 come from 7 brands — GM GENUINE, AGILITY, GPD and 4 other brands. The "Popular" part is TYC 13623.

The Economy section: 2 options from GPD and TECHPRO. GPD 13623C is listed in this group.

Standard Replacement: 5 parts, from GM GENUINE and AGILITY. A representative part number is AGILITY 8013623.

5 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 2019 Cadillac CT6 come from 2 brands — ACDELCO and PROFESSIONAL PARTS SWEDEN.

Listed part numbers: ACDELCO RC124 and PROFESSIONAL PARTS SWEDEN 21342353.

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

GM GENUINE supplies both parts for the 2019 Cadillac CT6.

This group includes GM GENUINE 23444086 and GM GENUINE 22790134.

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

8 Radiator Fan Assembly parts are listed for the 2019 Cadillac CT6, from TECHPRO, GM GENUINE and VEMO.

Economy: 3 parts, from TECHPRO. A representative part number is TECHPRO GM3115326.

The Standard Replacement section: 3 options from GM GENUINE. GM GENUINE 1581983 is listed in this group.

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

This group includes TECHPRO GM3115326, TECHPRO GM3115300 and TECHPRO GM3115335 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

6 Radiator Hose parts are listed for the 2019 Cadillac CT6, from ACDELCO and GM GENUINE.

This group includes ACDELCO 84207746, ACDELCO 84435789 and ACDELCO 84435790 and the remaining parts above.

This table covers the brackets that mount the Radiator Hose. 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 2019 Cadillac CT6 — GM GENUINE 84141881.

This table covers the Radiator insulators. Read more

One part is listed for the 2019 Cadillac CT6 — GM GENUINE 22799347.

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

15 Temperature Sender / Sensor parts for the 2019 Cadillac CT6 come from 10 brands — GM GENUINE, GPD, STANDARD MOTOR PRODUCTS and 7 other brands. The "Popular" part is GM GENUINE 12650595.

The Economy section: 5 options from GPD, HOLSTEIN, ULTRA-POWER and 1 other brand. GPD 1712908 is listed in this group.

Standard Replacement: 10 parts, from GM GENUINE, STANDARD MOTOR PRODUCTS, WALKER PRODUCTS and 3 other brands. A representative part number is GM GENUINE 12650595.

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

14 Thermostat parts are listed for the 2019 Cadillac CT6, from MOTORAD, SKP, CALORSTAT and 4 other brands. ACDELCO 131160 carries the "Popular" badge.

Economy: 3 parts, from SKP and AUTOTECNICA. A representative part number is AUTOTECNICA GM0720800.

The Heavy Duty section lists 1 option from MOTORAD — rated for severe service. MOTORAD 5523160 is listed in this group.

In the Performance grade, MOTORAD supplies 2 parts: engineered beyond original-equipment specification. A representative part number is MOTORAD 2523160.

The Standard Replacement section: 6 options from MOTORAD, CALORSTAT, ACDELCO and 1 other brand. ACDELCO 131160 is listed in this group.

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

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

13 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 2019 Cadillac CT6 come from 5 brands — GM GENUINE, FEL-PRO, ELRING and 2 other brands. The "Popular" part is FEL-PRO 35720.

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

6 Thermostat Housing / Water Outlet parts are listed for the 2019 Cadillac CT6, from GM GENUINE, ACDELCO, GATES and 1 other brand.

Part numbers include ACDELCO 1511109, GATES CO35087 and GM GENUINE 12741007, among others listed 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 2019 Cadillac CT6 come from 3 brands — GM GENUINE, FEL-PRO and MAHLE / CLEVITE.

Part numbers include FEL-PRO 36167, GM GENUINE 12647400 and GM GENUINE 12587397, among others listed 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

7 Water Pump parts are listed for the 2019 Cadillac CT6, from GM GENUINE, FVP, US MOTOR WORKS and 2 other brands. GM GENUINE 12707180 carries the "Popular" badge.

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

The Standard Replacement section: 3 options from GM GENUINE, ACDELCO and GATES. GM GENUINE 12707180 is listed in this group.

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

This group includes GM GENUINE 12707180 and FVP US8148 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

7 Water Pump Gasket parts for the 2019 Cadillac CT6 come from 3 brands — ELRING, GM GENUINE and FEL-PRO. The "Popular" part is GM GENUINE 2512072.

This group includes GM GENUINE 2512072, ELRING 048370 and ELRING 048320 and the remaining parts above.

This table covers the Water Pump Inlet tubes. Read more

One part is listed for the 2019 Cadillac CT6 — 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

2 Water Pump Pulley parts for the 2019 Cadillac CT6 come from GM GENUINE.

This group includes GM GENUINE 12652047 and GM GENUINE 12671045.

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 2019 Cadillac CT6.

Listed part numbers: GM GENUINE 12646951, GM GENUINE 12646952 and GM GENUINE 12649987.