This page lists 46 cooling system parts for the 2011 Buick Lacrosse, across 11 part types, covering both the 2.4L L4 and the 3.6L V6. Every part shows its brand, manufacturer part number and fitment notes.
On the 2011 Buick Lacrosse, the cooling system system keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses. 28 parts of the 46 listed are Coolant / Antifreeze (16 parts), Coolant Reservoir (7 parts) and Coolant Reservoir Cap (5 parts). The other 8 part types cover the remaining 18 parts.
The 2011 Buick Lacrosse was sold with both the 2.4L L4 and the 3.6L V6. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2011 Buick Lacrosse cooling system parts are GM GENUINE (9 parts), PRESTONE (6 parts) and DORMAN (4 parts), plus 14 more brands. Quality grades include Standard Replacement, Economy and Premium.
6 parts on this 2011 Buick Lacrosse page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including FVP MV5050GAL (Coolant / Antifreeze) and DORMAN 603385 (Coolant Reservoir). Click any part number to see every vehicle that part fits.
Coolant / Antifreeze
Compatible With All Colors
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Fits: 3.6L V6 | AF3055 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Prime YellowAll Vehicles | View on Amazon |
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP Popular Fits: 3.6L V6 | MV5050GAL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Extended LifeAll Makes / All Models | View on Amazon |
| PEAK Fits: 3.6L V6 | BQA1GAL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Blue Mountain Long LifeAll Vehicle | View on Amazon |
| PRESTONE Fits: 3.6L V6 | AF3100 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Prime Yellow - All VehiclesExtended Life | View on Amazon |
| VALVOLINE Fits: 3.6L V6 | 719009 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Multi-Vehicle Yellow1 Gallon | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Popular Fits: 3.6L V6 | AF2100 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | All Vehicles10yr/300k mi | View on Amazon |
| PEAK Fits: 3.6L V6 | PKP1GAL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | All Vehicles Antifreeze1 Gallon | View on Amazon |
| PEAK Fits: 3.6L V6 | PXA1GAL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Global Lifetime1 Gallon | View on Amazon |
| PRESTONE Fits: 3.6L V6 | AFMAX | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Max Universal1 Gallon | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Popular Fits: 3.6L V6 | 105027 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | DEX-Cool Extended LifeDexcool (with DE-Ionized Water) (with Bitterant) 1 Gallon | View on Amazon |
| VALVOLINE Popular Fits: 3.6L V6 | ZXEL1 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Dex-Cool Orange1 Gallon | View on Amazon |
| AISIN Fits: 3.6L V6 | ACD005 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | OrangeOAT | View on Amazon |
| FVP Fits: 3.6L V6 | DEX5050GAL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Extended Life Blend1 Gallon | View on Amazon |
| PRESTONE Fits: 3.6L V6 | AF3400 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Prime OrangeOrange Compatible | View on Amazon |
| PRESTONE Fits: 3.6L V6 | AF850 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | DEX-Cool Extended Life1 Gallon | View on Amazon |
| VALVOLINE Fits: 3.6L V6 | 888374 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | American Vehicle Orange1 Gallon | View on Amazon |
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.
16 Coolant / Antifreeze parts for the 2011 Buick Lacrosse come from 6 brands — PRESTONE, PEAK, VALVOLINE and 3 other brands. The "Popular" part is FVP MV5050GAL.
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.
Coolant Air Bleed Hose / Pipe
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Fits: 3.6L V6 | 12637185 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| GM GENUINE Fits: 3.6L V6 | 12637183 | 🇺🇸 US 🇨🇦 CA | Metal TubeBreather Pipe | View on Amazon |
This table covers the Coolant Air Bleed Hose pipes.
2 Coolant Air Bleed Hose / Pipe parts for the 2011 Buick Lacrosse come from GM GENUINE.
Part numbers include GM GENUINE 12637185 and GM GENUINE 12637183.
Coolant Air Bleeder
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: 3.6L V6 | 626588 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Air Bleeder Pipe | View on Amazon |
| GM GENUINE Fits: 3.6L V6 | 13267637 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the bleeders used to purge air from the coolant circuit.
2 Coolant Air Bleeder parts are listed for the 2011 Buick Lacrosse, from DORMAN and GM GENUINE.
This group includes DORMAN 626588 and GM GENUINE 13267637.
Coolant Bleed Hose Fitting
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Fits: 3.6L V6 | 12637187 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the Coolant Bleed Hose fittings.
This group shows a single part: GM GENUINE 12637187.
Coolant Hose / Pipe
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Fits: 3.6L V6 | 22965100 | 🇺🇸 US 🇨🇦 CA | Expansion Tank OutletSHORT SLEEVE | View on Amazon |
| GM GENUINE Fits: 3.6L V6 | 22962116 | 🇺🇸 US 🇨🇦 CA | Expansion Tank Inlet | View on Amazon |
This table covers the hard pipes and extra hoses in the coolant circuit.
2 Coolant Hose / Pipe parts for the 2011 Buick Lacrosse come from GM GENUINE.
This group includes GM GENUINE 22965100 and GM GENUINE 22962116.
Coolant Hose Connector / Flange
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: 3.6L V6 | 9022091 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | UpperTo Radiator Inlet Hose | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Fits: 3.6L V6 | 20847910 | 🇺🇸 US 🇨🇦 CA | InletRadiator Hose Connector | View on Amazon |
| MOTORAD Fits: 3.6L V6 | CH2091 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Includes Seal | View on Amazon |
This table covers the Coolant Hose Connector flanges.
3 Coolant Hose Connector / Flange parts for the 2011 Buick Lacrosse come from 3 brands — DORMAN, GM GENUINE 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.
Part numbers include DORMAN 9022091, GM GENUINE 20847910 and MOTORAD CH2091.
Coolant Reservoir
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Popular Fits: 3.6L V6 | 603385 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| AUTOTECNICA Fits: 3.6L V6 | GM0713819 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Includes cap & sensor | View on Amazon |
| GM GENUINE Fits: 3.6L V6 | 22950436 | 🇺🇸 US 🇨🇦 CA | without SENSORSwithout SENSOR | View on Amazon |
| GPD Fits: 3.6L V6 | 2411090 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| LARES Fits: 3.6L V6 | 37230 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Includes Cap | View on Amazon |
| TECHPRO Fits: 3.6L V6 | GM3014156 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| TECHPRO Fits: 3.6L V6 | GM3014157 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Includes Cap | View on Amazon |
This table covers the overflow / expansion tanks that hold extra coolant.
7 Coolant Reservoir parts are listed for the 2011 Buick Lacrosse, from TECHPRO, DORMAN, AUTOTECNICA and 3 other brands. DORMAN 603385 carries the "Popular" badge.
Part numbers include DORMAN 603385, AUTOTECNICA GM0713819 and GM GENUINE 22950436, among others listed above.
Coolant Reservoir Cap
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Popular Fits: 3.6L V6 | 54218 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| AUTOTECNICA Fits: 3.6L V6 | GM0714619 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Diameter: 45mmPressure Rating: 20psi | View on Amazon |
| CALORSTAT Fits: 3.6L V6 | RC0144 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Maximum Pressure Rating: 20.0 PS | View on Amazon |
| MOTORAD Fits: 3.6L V6 | T62 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Standard | View on Amazon |
| SKP Fits: 3.6L V6 | SK54218 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
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.
5 Coolant Reservoir Cap parts are listed for the 2011 Buick Lacrosse, from DORMAN, AUTOTECNICA, CALORSTAT and 2 other brands. DORMAN 54218 carries the "Popular" badge.
Part numbers include DORMAN 54218, AUTOTECNICA GM0714619 and CALORSTAT RC0144, among others listed above.
Coolant Reservoir Retainer / Clip
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Fits: 3.6L V6 | 13284504 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the Coolant Reservoir retainers and clips.
This group shows a single part: GM GENUINE 13284504.
Cooling Fan Control Module
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| US MOTOR WORKS Fits: 3.6L V6 | 16749 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Econo Control | View on Amazon |
| US MOTOR WORKS Fits: 3.6L V6 | 16789 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Better Control | View on Amazon |
| US MOTOR WORKS Fits: 3.6L V6 | 16795 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Best Control | View on Amazon |
This table covers the Cooling Fan control modules.
US MOTOR WORKS supplies the 3 Cooling Fan Control Module parts for the 2011 Buick Lacrosse.
Listed part numbers: US MOTOR WORKS 16749, US MOTOR WORKS 16789 and US MOTOR WORKS 16795.
Cooling System Tester Adapter
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GATES Fits: 3.6L V6 | 31431 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Cooling System Pressure | View on Amazon |
| GATES Fits: 3.6L V6 | 31391 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Cooling System PressureRadiator Cap | View on Amazon |
| MOTORAD Fits: 3.6L V6 | 3128 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | StandardRadiator Cap Adapter | View on Amazon |
| MOTORAD Fits: 3.6L V6 | 3127 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Standard | View on Amazon |
This table covers the adapters used to pressure-test this cooling system.
4 Cooling System Tester Adapter parts for the 2011 Buick Lacrosse come from 2 brands — GATES and MOTORAD.
Listed part numbers: GATES 31431, GATES 31391 and MOTORAD 3128, plus the other parts above.
Buying Cooling System Parts for a 2011 Buick Lacrosse
On this vehicle, the cooling system system keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses.
- Match the engine first. Every cooling system part here is engine-specific; each row shows which engine(s) it fits.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace the thermostat and refill with fresh coolant whenever you change a water pump or radiator; original hoses on an older vehicle are on borrowed time.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Coolant / Antifreeze and Coolant Reservoir .
Frequently Asked Questions
How many cooling system parts fit the 2011 Buick Lacrosse?
Our catalog currently lists 46 cooling system parts for the 2011 Buick Lacrosse across 11 subcategories and 17 brands, covering both the 2.4L L4 and the 3.6L V6. Each part is matched to the engine(s) it fits.
Do cooling system parts differ between 2011 Buick Lacrosse engines?
Yes. Every cooling system part on this page is engine-specific. Each row shows which engine(s) it fits — use the filter at the top to hide the rest. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of cooling system problems on a 2011 Buick Lacrosse?
Common symptoms include a rising temperature gauge in traffic, sweet-smelling steam, crusty deposits around hose clamps, or a heater that blows cold. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, replace the thermostat and refill with fresh coolant whenever you change a water pump or radiator; original hoses on an older vehicle are on borrowed time.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2011 Buick Lacrosse was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2011 Buick Lacrosse?
First match the engine — each row shows which engine(s) the part fits. Then replace coolant with the exact specification the manufacturer calls for — mixing chemistries can gel and block small passages. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2011 Buick Lacrosse
Cooling System Parts for Other Buick Lacrosse Years
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