2015 Buick Lacrosse 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 2015 Buick Lacrosse come from 6 brands — PRESTONE, PEAK, VALVOLINE and 3 other brands. The "Popular" part is FVP MV5050GAL. 14 parts fit every engine; the other 2 are engine-specific.

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

2 Coolant Air Bleed Hose / Pipe parts for the 2015 Buick Lacrosse come from GM GENUINE.

Part numbers include GM GENUINE 12637185 and GM GENUINE 12637183.

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

2 Coolant Air Bleeder parts are listed for the 2015 Buick Lacrosse, from DORMAN and GM GENUINE. 1 part fits every engine; the other 1 is engine-specific.

This group includes DORMAN 626588 and GM GENUINE 13267637.

This table covers the Coolant Bleed Hose fittings. Read more

2 Coolant Bleed Hose Fitting parts for the 2015 Buick Lacrosse come from GM GENUINE.

Part numbers include GM GENUINE 12589732 and GM GENUINE 12637187.

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

5 Coolant Hose / Pipe parts for the 2015 Buick Lacrosse come from 2 brands — GM GENUINE and CONTINENTAL.

This group includes CONTINENTAL 63080, GM GENUINE 22922980 and GM GENUINE 90537356 and the remaining 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

4 Coolant Hose / Pipe Seal parts are listed for the 2015 Buick Lacrosse, from APEX, FEL-PRO, GM GENUINE and 1 other brand.

Listed part numbers: APEX AWO2348, FEL-PRO 36068 and GM GENUINE 90537379, plus the other parts above.

This table covers the Coolant Hose Connector flanges. Read more

4 Coolant Hose Connector / Flange parts for the 2015 Buick Lacrosse come from 3 brands — GM GENUINE, DORMAN and MOTORAD.

The Economy section: 1 option from DORMAN. DORMAN 9022091 is listed in this group.

Standard Replacement: 2 parts, from GM GENUINE and MOTORAD. A representative part number is GM GENUINE 20847910.

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

Part numbers include DORMAN 9022091, GM GENUINE 20847910 and MOTORAD CH2091, among others listed above.

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

One part is listed for the 2015 Buick Lacrosse — AJUSA 01154600.

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

7 Coolant Reservoir parts are listed for the 2015 Buick Lacrosse, from TECHPRO, DORMAN, AUTOTECNICA and 3 other brands. DORMAN 603385 carries the "Popular" badge. All of them fit every engine offered in the 2015 Lacrosse.

This group includes DORMAN 603385, AUTOTECNICA GM0713819 and GM GENUINE 22950436 and the remaining 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

6 Coolant Reservoir Cap parts are listed for the 2015 Buick Lacrosse, from DORMAN, SKP, AUTOTECNICA and 3 other brands. DORMAN 54218 carries the "Popular" badge. 5 parts fit every engine; the other 1 is engine-specific.

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

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

This group shows a single part: GM GENUINE 13284504.

This table covers the Cooling Fan control modules. Read more

US MOTOR WORKS supplies the 3 Cooling Fan Control Module parts for the 2015 Buick Lacrosse. All of them fit every engine offered in the 2015 Lacrosse.

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 for the 2015 Buick Lacrosse come from 2 brands — MOTORAD and GATES. 2 parts fit every engine; the other 1 is engine-specific.

Part numbers include GATES 31391, MOTORAD 3128 and MOTORAD 3127.

This table covers the Hose clamps. Read more

5 Hose Clamp parts for the 2015 Buick Lacrosse come from GM GENUINE. 2 parts fit every engine; the other 3 are engine-specific.

This group includes GM GENUINE 90572594, GM GENUINE 13162312 and GM GENUINE 11570614 and the remaining parts above.

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

This group shows a single part: OSC 13329.

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 are listed for the 2015 Buick Lacrosse, from SKP, CSF, GPD and 1 other brand.

Economy: 1 part, from SKP. A representative part number is SKP SKTOC009.

The Standard Replacement section: 3 options from CSF, GPD and TECHPRO. CSF 3627 is listed in this group.

1 ungrouped part is not assigned to a grade, 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

8 Radiator parts for the 2015 Buick Lacrosse come from 8 brands — KOYORAD, TYC, AGILITY and 5 other brands. The "Popular" part is KOYORAD A13146. Every part fits both the 2.4L L4 and the 3.6L V6.

Part numbers include KOYORAD A13146, TYC 13146 and AGILITY 8013146, among others listed 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

3 Radiator Cap parts for the 2015 Buick Lacrosse come from 2 brands — ACDELCO and PROFESSIONAL PARTS SWEDEN. 2 parts fit every engine; the other 1 is engine-specific.

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

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

One part is listed for the 2015 Buick Lacrosse — DORMAN 61136.

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

7 Radiator Fan Assembly parts are listed for the 2015 Buick Lacrosse, from GM GENUINE, SKP, GPD and 3 other brands. SKP SK621441 carries the "Popular" badge. 6 parts fit every engine; the other 1 is engine-specific.

Economy: 2 parts, from SKP and GPD. A representative part number is SKP SK621441.

The Standard Replacement section: 5 options from GM GENUINE, FOUR SEASONS, TYC and 1 other brand. FOUR SEASONS 76300 is listed in this group.

Listed part numbers: SKP SK621441, GPD 2811869 and FOUR SEASONS 76300, plus the other parts above.

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

2 Radiator Fan Motor parts for the 2015 Buick Lacrosse come from VEMO. Every part fits both the 2.4L L4 and the 3.6L V6.

Part numbers include 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

19 Radiator Hose parts are listed for the 2015 Buick Lacrosse, from CONTINENTAL, ACDELCO, GATES and 1 other brand. ACDELCO 23203513 carries the "Popular" badge.

This table covers the Radiator insulators. Read more

One part is listed for the 2015 Buick Lacrosse — 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

One part is listed for the 2015 Buick Lacrosse — 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 are listed for the 2015 Buick Lacrosse, from DORMAN, SKP and ULTRA-POWER. All of them fit every engine offered in the 2015 Lacrosse.

Listed part numbers: DORMAN 926280 and SKP SK926280, plus the other 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

One part is listed for the 2015 Buick Lacrosse — GM GENUINE 22867535.

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

DORMAN supplies both parts for the 2015 Buick Lacrosse. All of them fit every engine offered in the 2015 Lacrosse.

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

25 Temperature Sender / Sensor parts for the 2015 Buick Lacrosse come from 17 brands — STANDARD MOTOR PRODUCTS, HOLSTEIN, UNITED MOTOR PRODUCTS and 14 other brands. The "Popular" part is SKP SKTX89. 8 parts fit every engine; the other 17 are engine-specific.

The Economy section: 8 options from HOLSTEIN, UNITED MOTOR PRODUCTS, SKP and 3 other brands. SKP SKTX89 is listed in this group.

The Full Service Kit section lists 1 option from WALKER PRODUCTS — grouped under the catalog's "Full Service Kit" designation — the notes column spells out what sets them apart. WALKER PRODUCTS 21191118 is listed in this group.

Standard Replacement: 16 parts, from GM GENUINE, STANDARD MOTOR PRODUCTS, NTK and 9 other brands. A representative part number is ACDELCO 2134514.

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

13 Thermostat parts are listed for the 2015 Buick Lacrosse, from MOTORAD, GATES, VEMO and 5 other brands. GATES 33943 carries the "Popular" badge.

Economy: 1 part, from VEMO. A representative part number is VEMO V40990024.

The Heavy Duty section lists 1 option from MOTORAD — rated for severe service. MOTORAD 5461180 is listed in this group.

The Premium section: 1 option from MOTORAD. MOTORAD 7461180 is listed in this group.

The Standard Replacement section: 10 options from MOTORAD, GATES, GM GENUINE and 4 other brands. GATES 33943 is listed in this group.

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

12 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 2015 Buick Lacrosse come from 8 brands — FEL-PRO, MAHLE / CLEVITE, APEX and 5 other brands. The "Popular" part is FEL-PRO 35346.

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

9 Thermostat Housing / Water Outlet parts are listed for the 2015 Buick Lacrosse, from GATES, MOTORAD, SKP and 4 other brands. SKP SK9022094 carries the "Popular" badge.

Economy: 2 parts, from SKP and DORMAN. A representative part number is SKP SK9022094.

The Standard Replacement section: 7 options from GATES, MOTORAD, GM GENUINE and 2 other brands. GM GENUINE 12597172 is listed in this group.

Part numbers include SKP SK9022094, DORMAN 9022094 and GM GENUINE 12597172, 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

This group shows a single part: GM GENUINE 90537471.

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

24 Water Pump parts are listed for the 2015 Buick Lacrosse, from GMB, DAYCO, CARDONE and 12 other brands. SKP SK1307350 carries the "Popular" badge.

Economy: 8 parts, from CARDONE, FVP, US MOTOR WORKS and 2 other brands. A representative part number is SKP SK1307350.

The Standard Replacement section: 16 options from GMB, DAYCO, GATES and 7 other brands. GATES 43529 is listed in this group.

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

14 Water Pump Gasket parts for the 2015 Buick Lacrosse come from 6 brands — FEL-PRO, VICTOR REINZ, ELRING and 3 other brands. The "Popular" part is FEL-PRO ES71282.

This table covers the Water Pump gears. Read more

5 Water Pump Gear parts for the 2015 Buick Lacrosse come from 5 brands — MELLING, CLOYES, FVP and 2 other brands. The "Popular" part is MELLING S911.

Part numbers include MELLING S911, among others listed above.

This table covers the Water Pump housings. Read more

This group shows a single part: GM GENUINE 90537266.