2015 Cadillac CTS 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 are listed for the 2015 Cadillac CTS, from PRESTONE, PEAK, VALVOLINE and 3 other brands. FVP MV5050GAL carries the "Popular" badge.

The Compatible With All Colors section lists 1 option from PRESTONE — grouped under the catalog's "Compatible With All Colors" designation — the notes column spells out what sets them apart. PRESTONE AF3055 is listed in this group.

In the Economy grade, FVP, PEAK, PRESTONE and 1 other brand supply 4 parts: the catalog's value-priced group. A representative part number is FVP MV5050GAL.

The Premium section lists 4 options from PRESTONE and PEAK — a step above OE specification in materials, tolerances or warranty terms. PRESTONE AF2100 is listed in this group.

The Standard Replacement section lists 7 options from VALVOLINE, PRESTONE, ACDELCO and 2 other brands — built to original-equipment specification. ACDELCO 105027 is listed in this group.

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

GM GENUINE supplies both parts for the 2015 Cadillac CTS.

Listed part numbers: GM GENUINE 12606243 and GM GENUINE 12614997.

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

This group shows a single part: GM GENUINE 12602048.

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

GM GENUINE supplies the 9 Coolant Hose / Pipe parts for the 2015 Cadillac CTS. GM GENUINE 23497424 carries the "Popular" badge.

Part numbers include GM GENUINE 23497424, GM GENUINE 22990652 and GM GENUINE 23135692, among others listed above.

This table covers the seals at the Coolant Hose / Pipe. 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 Coolant Hose / Pipe Seal parts for the 2015 Cadillac CTS come from 2 brands — ELRING and GM GENUINE.

Listed part numbers: ELRING 943630, ELRING 868630 and ELRING 857680, plus the other parts above.

This table covers the Coolant Hose Connector flanges. Read more

GM GENUINE supplies both parts for the 2015 Cadillac CTS.

Part numbers include GM GENUINE 25891276 and GM GENUINE 25891275.

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

GM GENUINE supplies the 3 Coolant Hose Retainer / Clip parts for the 2015 Cadillac CTS.

This group includes GM GENUINE 11547758, GM GENUINE 11547271 and GM GENUINE 11547756.

This table covers the gaskets that seal the Coolant Pipe. 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: AJUSA 01154600.

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

4 Coolant Reservoir parts for the 2015 Cadillac CTS come from 3 brands — TECHPRO, GM GENUINE and GPD.

Listed part numbers: GM GENUINE 22948113, GPD 2411335 and TECHPRO GM3014154, 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

10 Coolant Reservoir Cap parts for the 2015 Cadillac CTS come from 6 brands — MOTORAD, AUTOTECNICA, GATES and 3 other brands. The "Popular" part is MOTORAD T62.

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

One part is listed for the 2015 Cadillac CTS — GM GENUINE 22968257.

This table covers the Coolant Water Crossover Mounting sets. Read more

2 Coolant Water Crossover Mounting Set parts are listed for the 2015 Cadillac CTS, from FEL-PRO and VICTOR REINZ.

Listed part numbers: FEL-PRO ES73027 and VICTOR REINZ 181002301.

This table covers the Cooling Fan control modules. Read more

3 Cooling Fan Control Module parts for the 2015 Cadillac CTS come from 3 brands — GM GENUINE, SHEE-MAR and STANDARD MOTOR PRODUCTS.

This group includes GM GENUINE 1581991, SHEE-MAR SM1270 and STANDARD MOTOR PRODUCTS RY1941.

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

MOTORAD supplies both parts for the 2015 Cadillac CTS.

Part numbers include MOTORAD 3128 and MOTORAD 3127.

This table covers the Hose clamps. Read more

GM GENUINE supplies the 6 Hose Clamp parts for the 2015 Cadillac CTS.

This group includes GM GENUINE 90572594, GM GENUINE 11570871 and GM GENUINE 11611503 and the remaining parts above.

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

6 Intercooler parts are listed for the 2015 Cadillac CTS, from GM GENUINE, TECHPRO and GPD.

Economy: 1 part, from TECHPRO. A representative part number is TECHPRO GM3012114.

The Standard Replacement section: 2 options from GM GENUINE. GM GENUINE 12640408 is listed in this group.

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

Listed part numbers: TECHPRO GM3012114, GM GENUINE 12640408 and GM GENUINE 23194682, plus the other parts above.

This table covers the Intercooler Air Hose pipes. Read more

GM GENUINE supplies both parts for the 2015 Cadillac CTS.

This group includes GM GENUINE 12672014 and GM GENUINE 12701770.

This table covers the Intercooler covers. Read more

This group shows a single part: GM GENUINE 12631035.

This table covers the gaskets that seal the Intercooler. 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 Intercooler Gasket parts for the 2015 Cadillac CTS come from 2 brands — ELRING and GM GENUINE.

This group includes ELRING B18110, ELRING 857650 and GM GENUINE 12613457.

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

This group shows a single part: GM GENUINE 12608997.

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 are listed for the 2015 Cadillac CTS, from GPD, DENSO, ULTRA-POWER and 6 other brands. ULTRA-POWER 13285 carries the "Popular" badge.

Economy: 4 parts, from GPD and ULTRA-POWER. A representative part number is ULTRA-POWER 13285.

The Standard Replacement section: 8 options from DENSO, TYC, AGILITY and 4 other brands. DENSO 2219321 is listed in this group.

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

ACDELCO supplies the 3 Radiator Cap parts for the 2015 Cadillac CTS.

Listed part numbers: ACDELCO RC117, ACDELCO RC115 and ACDELCO RC116.

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

This group shows a single part: GM GENUINE 22887095.

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

12 Radiator Fan Assembly parts for the 2015 Cadillac CTS come from 8 brands — TECHPRO, GPD, UAC and 5 other brands. The "Popular" part is SKP SK623680.

The Economy section: 7 options from TECHPRO, GPD, SKP and 1 other brand. SKP SK623680 is listed in this group.

Standard Replacement: 5 parts, from UAC, TYC, AGILITY and 1 other brand. A representative part number is TYC 623680.

This table covers the Radiator Fan blades. Typical signs include chatter, streaks, or a skip at the top of the stroke. Confirm left and right lengths in the notes — they are often different. Read more

This group shows a single part: GM GENUINE 19129773.

This table covers the Radiator Fan resistors. Read more

One part is listed for the 2015 Cadillac CTS — STANDARD MOTOR PRODUCTS RY2010.

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 for the 2015 Cadillac CTS come from 3 brands — CONTINENTAL, ACDELCO and GM GENUINE.

Part numbers include ACDELCO 25880390, CONTINENTAL 67066 and CONTINENTAL 67065, among others listed above.

This table covers the Radiator Upper Air Baffle retainers and clips. Read more

This group shows a single part: GM GENUINE 10402850.

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

24 Temperature Sender / Sensor parts are listed for the 2015 Cadillac CTS, from STANDARD MOTOR PRODUCTS, WALKER PRODUCTS, HOLSTEIN and 12 other brands. STANDARD MOTOR PRODUCTS TX89T carries the "Popular" badge.

Economy: 7 parts, from HOLSTEIN, UNITED MOTOR PRODUCTS, STANDARD MOTOR PRODUCTS and 2 other brands. A representative part number is STANDARD MOTOR PRODUCTS TX89T.

In the Full Service Kit grade, WALKER PRODUCTS supplies 1 part: grouped under the catalog's "Full Service Kit" designation — the notes column spells out what sets them apart. A representative part number is WALKER PRODUCTS 21191118.

The Standard Replacement section: 16 options from GM GENUINE, STANDARD MOTOR PRODUCTS, WALKER PRODUCTS and 8 other brands. GM GENUINE 2134333 is listed in this group.

This table covers the Temperature Sender / Sensor 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

One part is listed for the 2015 Cadillac CTS — GM GENUINE 12639042.

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 for the 2015 Cadillac CTS come from 9 brands — MOTORAD, AUTOTECNICA, CALORSTAT and 6 other brands. The "Popular" part is CALORSTAT TH210786J.

The Economy section: 3 options from AUTOTECNICA and DORMAN. AUTOTECNICA GM0718523 is listed in this group.

Standard Replacement: 11 parts, from MOTORAD, CALORSTAT, GATES and 4 other brands. A representative part number is CALORSTAT TH210786J.

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

28 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 2015 Cadillac CTS, from FEL-PRO, GM GENUINE, APEX and 4 other brands. FEL-PRO 35855 carries the "Popular" badge. The notes list position, dimensions and spec qualifiers wherever the manufacturer distinguishes between variants.

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

4 Thermostat Housing / Water Outlet parts for the 2015 Cadillac CTS come from 4 brands — ACDELCO, GM GENUINE, MOTORAD and 1 other brand.

Listed part numbers: ACDELCO 12706565, GM GENUINE 1511056 and MOTORAD CH3140, plus the other 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

One part is listed for the 2015 Cadillac CTS — 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

25 Water Pump parts for the 2015 Cadillac CTS come from 13 brands — GATES, GM GENUINE, GMB and 10 other brands. The "Popular" part is SKP SK1305130.

The Economy section: 8 options from SKP, US MOTOR WORKS, FVP and 2 other brands. SKP SK1305130 is listed in this group.

Standard Replacement: 17 parts, from GATES, GM GENUINE, GMB and 5 other brands. A representative part number is GATES 43530.

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

13 Water Pump Gasket parts are listed for the 2015 Cadillac CTS, from FEL-PRO, VICTOR REINZ, GM GENUINE and 5 other brands. FEL-PRO ES73010 carries the "Popular" badge.

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

One part is listed for the 2015 Cadillac CTS — GM GENUINE 12611587.

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

4 Water Pump Seal / O-Ring parts for the 2015 Cadillac CTS come from 4 brands — APEX, FEL-PRO, GM GENUINE and 1 other brand.

Listed part numbers: APEX AWP3151, FEL-PRO 35633 and GM GENUINE 12691259, plus the other parts above.