2020 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 2020 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

This group shows a single part: GM GENUINE 84065808.

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

5 Coolant Hose / Pipe parts for the 2020 Cadillac CT6 come from GM GENUINE.

Part numbers include GM GENUINE 12704807, GM GENUINE 84065783 and GM GENUINE 84435788, among others listed above.

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 2020 Cadillac CT6 — GM GENUINE 1534890.

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

One part is listed for the 2020 Cadillac CT6 — GM GENUINE 84023872.

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 2020 Cadillac CT6, from DORMAN, CALORSTAT, GATES and 2 other brands. DORMAN 54218 carries the "Popular" badge.

Listed part numbers: DORMAN 54218, CALORSTAT RC0144 and GATES 31569, plus the other parts above.

This table covers the Hose clamps. Read more

5 Hose Clamp parts for the 2020 Cadillac CT6 come from GM GENUINE. The "Popular" part is GM GENUINE 11570871.

Listed part numbers: GM GENUINE 11570871, GM GENUINE 90572594 and GM GENUINE 11548976, plus the other parts above.

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

3 Intercooler parts for the 2020 Cadillac CT6 come from GM GENUINE.

Part numbers include GM GENUINE 12698228, GM GENUINE 12698229 and GM GENUINE 84551761.

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 2020 Cadillac CT6.

Part numbers include 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

4 Radiator parts for the 2020 Cadillac CT6 come from 2 brands — GM GENUINE and TECHPRO.

The Economy section: 1 option from TECHPRO. TECHPRO GM3010602 is listed in this group.

Standard Replacement: 3 parts, from GM GENUINE. A representative part number is GM GENUINE 21965.

This group includes TECHPRO GM3010602, GM GENUINE 21965 and GM GENUINE 21966 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

2 Radiator Cap parts for the 2020 Cadillac CT6 come from 2 brands — ACDELCO and PROFESSIONAL PARTS SWEDEN.

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 2020 Cadillac CT6 — GM GENUINE 22790134.

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

2 Radiator Fan Assembly parts are listed for the 2020 Cadillac CT6, from TECHPRO and GM GENUINE.

Economy: 1 part, from TECHPRO. A representative part number is TECHPRO GM3115335.

The Standard Replacement section: 1 option from GM GENUINE. GM GENUINE 1581998 is listed in this group.

Part numbers include TECHPRO GM3115335 and GM GENUINE 1581998.

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

4 Radiator Hose parts are listed for the 2020 Cadillac CT6, from ACDELCO and GM GENUINE.

This group includes ACDELCO 84435789, ACDELCO 84435790 and ACDELCO 84065778 and the remaining parts above.

This table covers the Radiator insulators. Read more

One part is listed for the 2020 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

9 Temperature Sender / Sensor parts for the 2020 Cadillac CT6 come from 8 brands — GM GENUINE, GPD, HOLSTEIN and 5 other brands. The "Popular" part is GM GENUINE 12694431.

The Economy section: 3 options from GPD, HOLSTEIN and ULTRA-POWER. GPD 1712496 is listed in this group.

Standard Replacement: 6 parts, from GM GENUINE, STANDARD MOTOR PRODUCTS, FACET and 2 other brands. A representative part number is GM GENUINE 12694431.

Listed part numbers: GM GENUINE 12694431, GPD 1712496 and HOLSTEIN 2CTS0184, plus the other parts above.

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

8 Thermostat parts are listed for the 2020 Cadillac CT6, from MOTORAD, CALORSTAT, SKP and 1 other brand. ACDELCO 131160 carries the "Popular" badge.

Economy: 1 part, from SKP. A representative part number is SKP SK131160.

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: 4 options from CALORSTAT, ACDELCO and MOTORAD. ACDELCO 131160 is listed in this group.

Part numbers include ACDELCO 131160, SKP SK131160 and MOTORAD 5523160, among others listed 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

4 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 2020 Cadillac CT6 come from 4 brands — ELRING, FEL-PRO, GM GENUINE and 1 other brand.

Part numbers include ELRING 782380, FEL-PRO 35720 and GM GENUINE 1534992, among others listed above.

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

GM GENUINE supplies both parts for the 2020 Cadillac CT6.

This group includes GM GENUINE 1581970 and GM GENUINE 1511132.

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 12587397.

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

GM GENUINE supplies both parts for the 2020 Cadillac CT6.

Listed part numbers: GM GENUINE 13566324 and GM GENUINE 251837.

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

2 Water Pump Gasket parts for the 2020 Cadillac CT6 come from 2 brands — ELRING and GM GENUINE.

Listed part numbers: ELRING B18510 and GM GENUINE 2512076.

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 12671045.