2019 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 2019 Buick Lacrosse come from 6 brands — PRESTONE, PEAK, VALVOLINE and 3 other brands. The "Popular" part is FVP MV5050GAL. Every part fits both the 2.5L L4 and the 3.6L V6.

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

5 Coolant Air Bleed Hose / Pipe parts for the 2019 Buick Lacrosse come from GM GENUINE.

Part numbers include GM GENUINE 26223350, GM GENUINE 12683454 and GM GENUINE 12653191, among others listed above.

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

3 Coolant Hose / Pipe parts for the 2019 Buick Lacrosse come from GM GENUINE.

Listed part numbers: GM GENUINE 12627054, GM GENUINE 12679317 and GM GENUINE 12669654.

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

2 Coolant Hose / Pipe Seal parts are listed for the 2019 Buick Lacrosse, from FEL-PRO and GM GENUINE.

Listed part numbers: FEL-PRO 36156 and GM GENUINE 12627055.

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 Buick Lacrosse — ELRING 599130.

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

This group shows a single part: GM GENUINE 15041309.

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

7 Coolant Reservoir parts are listed for the 2019 Buick Lacrosse, from TECHPRO, DORMAN, GM GENUINE and 3 other brands. DORMAN 603861 carries the "Popular" badge. 1 part fits every engine; the other 6 are engine-specific.

This group includes DORMAN 603861, GM GENUINE 23386455 and GPD 2411160 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 2019 Buick Lacrosse, from DORMAN, SKP, AUTOTECNICA and 3 other brands. DORMAN 54218 carries the "Popular" badge. 4 parts fit every engine; the other 2 are engine-specific.

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

This table covers the brackets that mount the Coolant Reservoir 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

This group shows a single part: GM GENUINE 23270619.

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

2 Cooling System Tester Adapter parts for the 2019 Buick Lacrosse come from MOTORAD. Every part fits both the 2.5L L4 and the 3.6L V6.

Listed part numbers: MOTORAD 3128 and MOTORAD 3127.

This table covers the Hose clamps. Read more

3 Hose Clamp parts for the 2019 Buick Lacrosse come from GM GENUINE.

Part numbers include GM GENUINE 90572587, GM GENUINE 11548236 and GM GENUINE 13307373.

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

9 Radiator parts for the 2019 Buick Lacrosse come from 9 brands — FAMOUS BRAND, CSF, TYC and 6 other brands. The "Popular" part is CSF 3898.

The Economy section: 1 option from FAMOUS BRAND. FAMOUS BRAND 4113574 is listed in this group.

Standard Replacement: 8 parts, from CSF, TYC, AGILITY and 5 other brands. A representative part number is CSF 3898.

This group includes CSF 3898, FAMOUS BRAND 4113574 and TYC 13574 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 2019 Buick Lacrosse come from 2 brands — ACDELCO and PROFESSIONAL PARTS SWEDEN.

This group includes 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 2019 Buick Lacrosse — GM GENUINE 23444086.

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

4 Radiator Fan Assembly parts are listed for the 2019 Buick Lacrosse, from GM GENUINE, TECHPRO and FOUR SEASONS.

Economy: 1 part, from TECHPRO. A representative part number is TECHPRO GM3115320.

The Standard Replacement section: 3 options from GM GENUINE and FOUR SEASONS. FOUR SEASONS 75191 is listed in this group.

Listed part numbers: TECHPRO GM3115320, FOUR SEASONS 75191 and GM GENUINE 1581928, plus the other 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

2 Radiator Hose parts are listed for the 2019 Buick Lacrosse, from ACDELCO and GM GENUINE.

Listed part numbers: ACDELCO 26215481 and GM GENUINE 26215482.

This table covers the Radiator insulators. Read more

One part is listed for the 2019 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

One part is listed for the 2019 Buick Lacrosse — DORMAN 926280.

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 2019 Buick Lacrosse — GM GENUINE 23223151.

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

10 Temperature Sender / Sensor parts for the 2019 Buick Lacrosse come from 8 brands — STANDARD MOTOR PRODUCTS, DORMAN, GPD and 5 other brands. The "Popular" part is GM GENUINE 12650595.

The Economy section: 5 options from DORMAN, GPD, HOLSTEIN and 2 other brands. DORMAN 926016 is listed in this group.

Standard Replacement: 5 parts, from STANDARD MOTOR PRODUCTS, GM GENUINE, DELPHI and 1 other brand. A representative part number is GM GENUINE 12650595.

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

4 Thermostat parts are listed for the 2019 Buick Lacrosse, from MOTORAD and FOUR SEASONS.

The Heavy Duty section lists 1 option from MOTORAD — rated for severe service. MOTORAD 5860203 is listed in this group.

The Standard Replacement section: 3 options from MOTORAD and FOUR SEASONS. FOUR SEASONS 86343 is listed in this group.

This group includes MOTORAD 5860203, FOUR SEASONS 86343 and MOTORAD 860203 and the remaining parts 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

5 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 2019 Buick Lacrosse come from 4 brands — GM GENUINE, ELRING, FEL-PRO and 1 other brand. The "Popular" part is GM GENUINE 12623519.

Listed part numbers: GM GENUINE 12623519, ELRING 048290 and FEL-PRO 36165, plus the other parts above.

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

One part is listed for the 2019 Buick Lacrosse — GM GENUINE 12741009.

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

3 Water Inlet Gasket parts for the 2019 Buick Lacrosse come from 3 brands — FEL-PRO, GM GENUINE and MAHLE / CLEVITE.

Listed part numbers: FEL-PRO 36167, GM GENUINE 12647400 and MAHLE / CLEVITE C33508.

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

8 Water Pump parts are listed for the 2019 Buick Lacrosse, from GATES, FVP, US MOTOR WORKS and 4 other brands. ACDELCO 2521038 carries the "Popular" badge.

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

The Standard Replacement section: 5 options from GATES, ACDELCO, GM GENUINE and 1 other brand. ACDELCO 2521038 is listed in this group.

1 ungrouped part is not assigned to a grade, with the same engine-level match.

Part numbers include ACDELCO 2521038 and FVP US8148, among others listed 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

3 Water Pump Gasket parts for the 2019 Buick Lacrosse come from 3 brands — ELRING, FEL-PRO and GM GENUINE.

This group includes ELRING 237160, FEL-PRO 36153 and GM GENUINE 2512072.

This table covers the Water Pump Inlet tubes. Read more

One part is listed for the 2019 Buick Lacrosse — GM GENUINE 12671066.

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 12652047.

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 Buick Lacrosse.

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