2012 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 are listed for the 2012 Buick Lacrosse, from PRESTONE, PEAK, VALVOLINE and 3 other brands. FVP MV5050GAL carries the "Popular" badge. 14 parts fit every engine; the other 2 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 2012 Buick Lacrosse.

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 for the 2012 Buick Lacrosse come from 2 brands — DORMAN and GM GENUINE. 1 part fits every engine; the other 1 is engine-specific.

Part numbers include DORMAN 626588 and GM GENUINE 13267637.

This table covers the Coolant Bleed Hose fittings. Read more

GM GENUINE supplies both parts for the 2012 Buick Lacrosse.

Listed part numbers: GM GENUINE 12589732 and GM GENUINE 12637187.

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

GM GENUINE supplies the 4 Coolant Hose / Pipe parts for the 2012 Buick Lacrosse.

This group includes GM GENUINE 22922980, GM GENUINE 90537356 and GM GENUINE 22965100 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

5 Coolant Hose / Pipe Seal parts for the 2012 Buick Lacrosse come from 5 brands — FEL-PRO, AJUSA, APEX and 2 other brands. The "Popular" part is FEL-PRO 36068.

Part numbers include FEL-PRO 36068, AJUSA 16063000 and APEX AWO2348, among others listed above.

This table covers the Coolant Hose Connector flanges. Read more

4 Coolant Hose Connector / Flange parts are listed for the 2012 Buick Lacrosse, from GM GENUINE, DORMAN and MOTORAD.

Economy: 1 part, from DORMAN. A representative part number is DORMAN 9022091.

The Standard Replacement section: 2 options from GM GENUINE and MOTORAD. GM GENUINE 20847910 is listed in this group.

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

This group includes DORMAN 9022091, GM GENUINE 20847910 and MOTORAD CH2091 and the remaining parts 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

This group shows a single part: AJUSA 01154600.

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

7 Coolant Reservoir parts for the 2012 Buick Lacrosse come from 6 brands — TECHPRO, DORMAN, AUTOTECNICA and 3 other brands. The "Popular" part is DORMAN 603385. Every part fits both the 2.4L L4 and the 3.6L V6.

Listed part numbers: DORMAN 603385, AUTOTECNICA GM0713819 and GM GENUINE 22950436, 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

6 Coolant Reservoir Cap parts for the 2012 Buick Lacrosse come from 6 brands — DORMAN, SKP, AUTOTECNICA and 3 other brands. The "Popular" part is DORMAN 54218. 5 parts fit every engine; the other 1 is engine-specific.

Part numbers include DORMAN 54218, SKP SK54218 and AUTOTECNICA GM0714619, among others listed above.

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

One part is listed for the 2012 Buick Lacrosse — GM GENUINE 13284504.

This table covers the Cooling Fan control modules. Read more

3 Cooling Fan Control Module parts for the 2012 Buick Lacrosse come from US MOTOR WORKS. Every part fits both the 2.4L L4 and the 3.6L V6.

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

4 Cooling System Tester Adapter parts are listed for the 2012 Buick Lacrosse, from GATES and MOTORAD. All of them fit every engine offered in the 2012 Lacrosse.

This group includes GATES 31431, GATES 31391 and MOTORAD 3128 and the remaining parts above.

This table covers the Hose clamps. Read more

GM GENUINE supplies the 5 Hose Clamp parts for the 2012 Buick Lacrosse. 2 parts fit every engine; the other 3 are engine-specific.

Listed part numbers: GM GENUINE 90572594, GM GENUINE 13162312 and GM GENUINE 11570614, plus the other parts above.

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

One part is listed for the 2012 Buick Lacrosse — 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 for the 2012 Buick Lacrosse come from 4 brands — SKP, CSF, GPD 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.

This group includes SKP SKTOC009, CSF 3627 and GPD 2611364 and the remaining parts 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 are listed for the 2012 Buick Lacrosse, from KOYORAD, TYC, AGILITY and 5 other brands. KOYORAD A13146 carries the "Popular" badge. All of them fit every engine offered in the 2012 Lacrosse.

Listed part numbers: KOYORAD A13146, TYC 13146 and AGILITY 8013146, plus the other 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 are listed for the 2012 Buick Lacrosse, from ACDELCO and PROFESSIONAL PARTS SWEDEN. All of them fit every engine offered in the 2012 Lacrosse.

This group includes ACDELCO RC124 and PROFESSIONAL PARTS SWEDEN 21342353.

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

This group shows a single part: 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 for the 2012 Buick Lacrosse come from 6 brands — GM GENUINE, SKP, GPD and 3 other brands. The "Popular" part is SKP SK621441. 6 parts fit every engine; the other 1 is engine-specific.

The Economy section: 2 options from SKP and GPD. SKP SK621441 is listed in this group.

Standard Replacement: 5 parts, from GM GENUINE, FOUR SEASONS, TYC and 1 other brand. A representative part number is FOUR SEASONS 76300.

This group includes SKP SK621441, GPD 2811869 and FOUR SEASONS 76300 and the remaining 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

VEMO supplies both parts for the 2012 Buick Lacrosse. All of them fit every engine offered in the 2012 Lacrosse.

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

12 Radiator Hose parts for the 2012 Buick Lacrosse come from 4 brands — ACDELCO, GATES, CONTINENTAL and 1 other brand. The "Popular" part is ACDELCO 23203513.

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

This group shows a single part: 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 2012 Buick Lacrosse come from 3 brands — DORMAN, SKP and ULTRA-POWER. Every part fits both the 2.4L L4 and the 3.6L V6.

Part numbers include DORMAN 926280 and SKP SK926280, among others listed 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

This group shows a single part: 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 2012 Buick Lacrosse come from DORMAN.

Part numbers include 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

14 Temperature Sender / Sensor parts are listed for the 2012 Buick Lacrosse, from WALKER PRODUCTS, STANDARD MOTOR PRODUCTS, DORMAN and 9 other brands. WALKER PRODUCTS 21191118 carries the "Popular" badge.

Economy: 3 parts, from DORMAN, GPD and UNITED MOTOR PRODUCTS. A representative part number is DORMAN 926016.

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: 10 options from STANDARD MOTOR PRODUCTS, HELLA, WALKER PRODUCTS and 6 other brands. HELLA 009107271 is listed in this group.

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 for the 2012 Buick Lacrosse come from 6 brands — GATES, MOTORAD, AUTOTECNICA and 3 other brands. The "Popular" part is GATES 34163.

The Economy section: 2 options from AUTOTECNICA and SKP. AUTOTECNICA GM0720267 is listed in this group.

Standard Replacement: 5 parts, from GATES, MOTORAD and FOUR SEASONS. A representative part number is GATES 34163.

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

This group includes GATES 34163, AUTOTECNICA GM0720267 and SKP SK902693 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

17 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 2012 Buick Lacrosse, from FEL-PRO, GM GENUINE, APEX and 3 other brands. FEL-PRO 35855 carries the "Popular" badge.

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

5 Thermostat Housing / Water Outlet parts for the 2012 Buick Lacrosse come from 4 brands — GM GENUINE, GATES, MOTORAD and 1 other brand. The "Popular" part is GM GENUINE 1511053.

Part numbers include GM GENUINE 1511053, GATES CO35096 and GM GENUINE 1581750, among others listed above.

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

16 Water Pump parts for the 2012 Buick Lacrosse come from 15 brands — GM GENUINE, BECK/ARNLEY, SKP and 12 other brands. The "Popular" part is BECK/ARNLEY 1312378.

The Economy section: 8 options from BECK/ARNLEY, SKP, CARTER and 5 other brands. BECK/ARNLEY 1312378 is listed in this group.

Standard Replacement: 8 parts, from GM GENUINE, GATES, ACDELCO and 4 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

5 Water Pump Gasket parts are listed for the 2012 Buick Lacrosse, from GM GENUINE, APEX, FEL-PRO and 2 other brands. GM GENUINE 2512052 carries the "Popular" badge.

Part numbers include GM GENUINE 2512052, APEX AWP3231 and FEL-PRO 35859, among others listed above.

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 2012 Buick Lacrosse — 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

This group shows a single part: GM GENUINE 12691259.