2015 Buick Regal 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 Buick Regal, from PRESTONE, PEAK, VALVOLINE and 3 other brands. FVP MV5050GAL carries the "Popular" badge. 2 parts fit every engine; the other 14 are engine-specific.

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 Buick Regal.

Part numbers include GM GENUINE 12634280 and GM GENUINE 12683453.

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

This group shows a single part: GM GENUINE 13267637.

This table covers the Coolant Bleed Hose fittings. Read more

One part is listed for the 2015 Buick Regal — GM GENUINE 12589732.

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

8 Coolant Hose / Pipe parts are listed for the 2015 Buick Regal, from GM GENUINE, CONTINENTAL, GATES and 1 other brand. CONTINENTAL 63912 carries the "Popular" badge.

Listed part numbers: CONTINENTAL 63912, GATES 28475 and ACDELCO 16199M, plus the other parts 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

7 Coolant Hose / Pipe Seal parts for the 2015 Buick Regal come from 4 brands — FEL-PRO, GM GENUINE, MAHLE / CLEVITE and 1 other brand.

Listed part numbers: APEX AWO2348, FEL-PRO 36156 and FEL-PRO 36068, plus the other parts above.

This table covers the Coolant Hose Connector flanges. Read more

One part is listed for the 2015 Buick Regal — GM GENUINE 12607291.

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

This group shows a single part: ELRING 599130.

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

7 Coolant Reservoir parts for the 2015 Buick Regal come from 6 brands — TECHPRO, DORMAN, AUTOTECNICA and 3 other brands. The "Popular" part is DORMAN 603385. 1 part fits every engine; the other 6 are engine-specific.

Part numbers include DORMAN 603385, AUTOTECNICA GM0713819 and GM GENUINE 22950436, among others listed 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 for the 2015 Buick Regal come from 6 brands — DORMAN, SKP, AUTOTECNICA and 3 other brands. The "Popular" part is DORMAN 54218.

Listed part numbers: DORMAN 54218, SKP SK54218 and AUTOTECNICA GM0714619, plus the other parts above.

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

One part is listed for the 2015 Buick Regal — GM GENUINE 13284504.

This table covers the Cooling Fan control modules. Read more

3 Cooling Fan Control Module parts for the 2015 Buick Regal come from US MOTOR WORKS.

Listed part numbers: US MOTOR WORKS 16749, US MOTOR WORKS 16789 and US MOTOR WORKS 16795.

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

3 Cooling System Tester Adapter parts are listed for the 2015 Buick Regal, from MOTORAD and GATES.

This group includes GATES 31391, MOTORAD 3128 and MOTORAD 3127.

This table covers the Hose clamps. Read more

GM GENUINE supplies the 8 Hose Clamp parts for the 2015 Buick Regal. GM GENUINE 13162312 carries the "Popular" badge.

Part numbers include GM GENUINE 13162312, GM GENUINE 90530642 and GM GENUINE 90572595, among others listed above.

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

7 Intercooler parts are listed for the 2015 Buick Regal, from TECHPRO, GM GENUINE, TYC and 4 other brands. GM GENUINE 20979494 carries the "Popular" badge.

Economy: 1 part, from TECHPRO. A representative part number is TECHPRO GM3012105.

The Standard Replacement section: 1 option from GM GENUINE. GM GENUINE 20979494 is listed in this group.

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

Part numbers include GM GENUINE 20979494, TECHPRO GM3012105 and TYC 18076, among others listed above.

This table covers the Intercooler Air Hose pipes. Read more

GM GENUINE supplies both parts for the 2015 Buick Regal.

This group includes GM GENUINE 22844518 and GM GENUINE 23131218.

This table covers the Inverter coolers. Typical signs include overheated fluid, a leak at the fittings, or mixed fluids in the reservoir. Flush the lines when you replace a cooler. Read more

5 Inverter Cooler parts for the 2015 Buick Regal come from 4 brands — TECHPRO, SKP, CSF and 1 other brand.

The Economy section: 1 option from SKP. SKP SKTOC009 is listed in this group.

Standard Replacement: 3 parts, from CSF, GPD and TECHPRO. A representative part number is CSF 3627.

1 further part sits outside the graded sections, with the same engine-level match.

Part numbers include SKP SKTOC009, CSF 3627 and GPD 2611364, among others listed above.

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

17 Radiator parts are listed for the 2015 Buick Regal, from AGILITY, CSF, KOYORAD and 8 other brands. DENSO 2219313 carries the "Popular" badge.

Economy: 1 part, from GPD. A representative part number is GPD 13587C.

The Standard Replacement section: 8 options from DENSO, SPECTRA PREMIUM, AGILITY and 5 other brands. DENSO 2219313 is listed in this group.

8 ungrouped parts are not assigned to a grade, 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

3 Radiator Cap parts are listed for the 2015 Buick Regal, from ACDELCO and PROFESSIONAL PARTS SWEDEN.

Part numbers include ACDELCO RC124, ACDELCO 12R05 and PROFESSIONAL PARTS SWEDEN 21342353.

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

2 Radiator Drain Petcock parts for the 2015 Buick Regal come from 2 brands — DORMAN and GM GENUINE.

Listed part numbers: DORMAN 61136 and GM GENUINE 22790134.

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

11 Radiator Fan Assembly parts for the 2015 Buick Regal come from 8 brands — GPD, TYC, GM GENUINE and 5 other brands. The "Popular" part is SKP SK621441.

The Economy section: 3 options from GPD and SKP. SKP SK621441 is listed in this group.

Standard Replacement: 8 parts, from TYC, GM GENUINE, AGILITY and 3 other brands. A representative part number is AGILITY 6010289.

This table covers the Radiator Fan motors. Typical signs include no motion, a squeal, or a motor that only runs on one speed. Confirm power, ground and the control module before replacing the motor. Read more

VEMO supplies both parts for the 2015 Buick Regal.

Listed part numbers: VEMO V51010034 and VEMO V51010035.

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

18 Radiator Hose parts for the 2015 Buick Regal come from 5 brands — CONTINENTAL, GATES, DAYCO and 2 other brands. The "Popular" part is ACDELCO 23105391.

This table covers the Radiator insulators. Read more

This group shows a single part: GM GENUINE 13306606.

This table covers the Radiator mounts. Typical signs include a clunk on takeoff, a vibration at idle, or a separated rubber insert. Support the powertrain before unbolting a mount, and torque the fasteners in the notes. Read more

2 Radiator Mount parts for the 2015 Buick Regal come from GM GENUINE.

This group includes GM GENUINE 22947568 and GM GENUINE 52493483.

This table covers the Radiator Mount bushings. Typical signs include a clunk over bumps, or a torn or walked-out bushing you can see. Press the new bushing square. A cocked bushing will tear in a few thousand miles. Read more

3 Radiator Mount Bushing parts for the 2015 Buick Regal come from 3 brands — DORMAN, SKP and ULTRA-POWER.

This group includes DORMAN 926280 and SKP SK926280 and the remaining parts above.

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

2 Radiator Seal parts for the 2015 Buick Regal come from GM GENUINE.

Part numbers include GM GENUINE 13330389 and GM GENUINE 22867535.

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

2 Radiator Upper Air Baffle Retainer / Clip parts for the 2015 Buick Regal come from DORMAN.

Listed part numbers: DORMAN 700365 and DORMAN 963058.

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

29 Temperature Sender / Sensor parts are listed for the 2015 Buick Regal, from STANDARD MOTOR PRODUCTS, WALKER PRODUCTS, HOLSTEIN and 16 other brands. GPD 1712489 carries the "Popular" badge. Grades run from Economy through Standard Replacement; Standard Replacement is the most populated section, led by GM GENUINE, STANDARD MOTOR PRODUCTS, FACET and 9 other brands.

This table covers the Temperature Sender / Sensor clips. Read more

One part is listed for the 2015 Buick Regal — DORMAN 66264.

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 Buick Regal — 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

22 Thermostat parts for the 2015 Buick Regal come from 12 brands — MOTORAD, GATES, CALORSTAT and 9 other brands. The "Popular" part is GATES 34717.

The Economy section: 4 options from AUTOTECNICA, DORMAN, SKP and 1 other brand. AUTOTECNICA GM0720261 is listed in this group.

In the Heavy Duty grade, MOTORAD supplies 1 part: rated for severe service. A representative part number is MOTORAD 5461180.

Premium: 1 part, from MOTORAD. A representative part number is MOTORAD 7461180.

Standard Replacement: 16 parts, from GATES, MOTORAD, CALORSTAT and 5 other brands. A representative part number is GATES 34717.

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

20 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 2015 Buick Regal, from MAHLE / CLEVITE, FEL-PRO, GM GENUINE and 5 other brands. FEL-PRO 35346 carries the "Popular" badge.