2000 Buick Lesabre Cooling System Parts

Engine:
3.8L V6

This page lists 50 cooling system parts for the 2000 Buick Lesabre, across 11 part types, covering the 3.8L V6 engine. Every part shows its brand, manufacturer part number and fitment notes.

On the 2000 Buick Lesabre, 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. Most of the listed parts are Coolant / Antifreeze (16 parts), Radiator Cap (9 parts) and Coolant Hose / Pipe (4 parts). The other 8 part types cover the remaining 21 parts.

Coolant / Antifreeze

Compatible With All Colors

Brand Part Number Markets Notes Buy
PRESTONE AF3055
🇺🇸 US 🇨🇦 CA
Prime YellowAll Vehicles
Fitment notes — PRESTONE AF3055
Prime YellowAll VehiclesExtended Life55 GAL DrumConcentratePrime® Extended Life All Makes All Models
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Economy

Brand Part Number Markets Notes Buy
FVP Popular MV5050GAL
🇺🇸 US 🇨🇦 CA
Extended LifeAll Makes / All Models
Fitment notes — FVP MV5050GAL
Extended LifeAll Makes / All Models1 Gallon
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PEAK BQA1GAL
🇺🇸 US 🇨🇦 CA
Blue Mountain Long LifeAll Vehicle
Fitment notes — PEAK BQA1GAL
Blue Mountain Long LifeAll Vehicle1 Gallon
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PRESTONE AF3100
🇺🇸 US 🇨🇦 CA
Prime Yellow - All VehiclesExtended Life
Fitment notes — PRESTONE AF3100
Prime Yellow - All VehiclesExtended Life1 Gallon
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VALVOLINE 719009
🇺🇸 US 🇨🇦 CA
Multi-Vehicle Yellow1 Gallon
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Premium

Brand Part Number Markets Notes Buy
PRESTONE Popular AF2100
🇺🇸 US 🇨🇦 CA
All Vehicles10yr/300k mi
Fitment notes — PRESTONE AF2100
All Vehicles10yr/300k mi1 GallonExtended Life
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PEAK PKP1GAL
🇺🇸 US 🇨🇦 CA
All Vehicles Antifreeze1 Gallon
Fitment notes — PEAK PKP1GAL
All Vehicles Antifreeze1 GallonPREMIUM1 GALLON10X MORE SCALE FIGHTING INHIBITORS10 YEAR/300K MILES
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PEAK PXA1GAL
🇺🇸 US 🇨🇦 CA
1 GallonGlobal Lifetime
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PRESTONE AFMAX
🇺🇸 US 🇨🇦 CA
Max Universal1 Gallon
Fitment notes — PRESTONE AFMAX
Max Universal1 Gallon15 Year/350k Miles
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Standard Replacement

Brand Part Number Markets Notes Buy
ACDELCO Popular 105027
🇺🇸 US 🇨🇦 CA
DEX-Cool Extended LifeDexcool (with DE-Ionized Water) (with Bitterant) 1 Gallon
Fitment notes — ACDELCO 105027
DEX-Cool Extended LifeDexcool (with DE-Ionized Water) (with Bitterant) 1 GallonPremix1 Gallon GM Original EquipmentOrange
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VALVOLINE Popular ZXEL1
🇺🇸 US 🇨🇦 CA
Dex-Cool Orange1 Gallon
Fitment notes — VALVOLINE ZXEL1
Dex-Cool Orange1 GallonOAT
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AISIN ACD005
🇺🇸 US 🇨🇦 CA
OrangeOAT
Fitment notes — AISIN ACD005
OrangeOAT
(Type: Prediluted)
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FVP DEX5050GAL
🇺🇸 US 🇨🇦 CA
Extended Life Blend1 Gallon
Fitment notes — FVP DEX5050GAL
Extended Life Blend1 GallonOrangeOAT
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PRESTONE AF3400
🇺🇸 US 🇨🇦 CA
Prime OrangeOrange Compatible
Fitment notes — PRESTONE AF3400
Prime OrangeOrange CompatibleExtended Life1 Gallon ConcentrateOAT
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PRESTONE AF850
🇺🇸 US 🇨🇦 CA
DEX-Cool Extended Life1 Gallon
Fitment notes — PRESTONE AF850
DEX-Cool Extended Life1 GallonOrangeOAT
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VALVOLINE 888374
🇺🇸 US 🇨🇦 CA
American Vehicle Orange1 Gallon
Fitment notes — VALVOLINE 888374
American Vehicle Orange1 Gallon
(Type: Prediluted)
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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.

Coolant Air Bleeder

Brand Part Number Markets Notes Buy
DORMAN 902112
🇺🇸 US 🇨🇦 CA
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This table covers the bleeders used to purge air from the coolant circuit.

Coolant Hose / Pipe

Brand Part Number Markets Notes Buy
ACDELCO 18455L
🇺🇸 US 🇨🇦 CA
Professional / GoldMolded
Fitment notes — ACDELCO 18455L
Professional / GoldMolded
Reservoir To Radiator
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DAYCO 88000
🇺🇸 US 🇨🇦 CA
Radiator to Reservoir
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GM GENUINE 12565082
🇺🇸 US 🇨🇦 CA
Thermostat Bypass
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GM GENUINE 24503423
🇺🇸 US 🇨🇦 CA
to lower intake manifold.Thermostat Bypass
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This table covers the hard pipes and extra hoses in the coolant circuit.

Coolant Hose / Pipe Seal

Brand Part Number Markets Notes Buy
FEL-PRO 36021
🇺🇸 US 🇨🇦 CA
Water Bypass Seal
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GM GENUINE 1534066
🇺🇸 US 🇨🇦 CA
0.674" Diameter
Fitment notes — GM GENUINE 1534066
0.674" Diameter
Fits:
Teflon Coated, Orange with Black Coating, To Tensioner Assembly0.674 I.D.Bypass Lin
or:
To Tens and Elbow, To Elbow and lower intake manifoldTeflon Coated0.674 I.D.Thermostat Bypass Pipe Seal
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GM GENUINE 24502846
🇺🇸 US 🇨🇦 CA
To Front CVRThermostat Bypass Pipe Seal
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MAHLE / CLEVITE C31274
🇺🇸 US 🇨🇦 CA
Paper
Fitment notes — MAHLE / CLEVITE C31274
Paper
Water Bypass Seal
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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.

Coolant Hose Connector / Flange

Brand Part Number Markets Notes Buy
FOUR SEASONS 86500
🇺🇸 US 🇨🇦 CA
Coolant Coupling
Fitment notes — FOUR SEASONS 86500
Coolant Coupling
Coolant Coupling
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This table covers the Coolant Hose Connector flanges.

Coolant Level Sensor

Brand Part Number Markets Notes Buy
FAMOUS BRAND SBA3759
🇺🇸 US 🇨🇦 CA
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GPD 1712533
🇺🇸 US 🇨🇦 CA
Engine Coolant Level Sensor
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STANDARD MOTOR PRODUCTS FLS17
🇺🇸 US 🇨🇦 CA
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WELLS 5S1453
🇺🇸 US 🇨🇦 CA
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This table covers the Coolant Level sensors. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors.

Coolant Reservoir

Brand Part Number Markets Notes Buy
TECHPRO GM3014104
🇺🇸 US 🇨🇦 CA
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This table covers the overflow / expansion tanks that hold extra coolant.

Coolant Reservoir Cap

Brand Part Number Markets Notes Buy
DORMAN 82594
🇺🇸 US 🇨🇦 CA
Coolant Cap
Fitment notes — DORMAN 82594
Coolant Cap
without Vented Cap
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DORMAN 54217
🇺🇸 US 🇨🇦 CA
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GM GENUINE RC122
🇺🇸 US 🇨🇦 CA
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MOTORAD T80
🇺🇸 US 🇨🇦 CA
Standard
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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.

Cooling Fan Control Module

Brand Part Number Markets Notes Buy
US MOTOR WORKS 16749
🇺🇸 US 🇨🇦 CA
Econo Control
Fitment notes — US MOTOR WORKS 16749
Econo Control
Requires 16763 Single Relay Harness
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US MOTOR WORKS 16789
🇺🇸 US 🇨🇦 CA
Better Control
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US MOTOR WORKS 16795
🇺🇸 US 🇨🇦 CA
Best Control
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This table covers the Cooling Fan control modules.

Cooling System Tester Adapter

Brand Part Number Markets Notes Buy
ACDELCO 12A01
🇺🇸 US 🇨🇦 CA
ProfessionalIncluded In Tester
Fitment notes — ACDELCO 12A01
ProfessionalIncluded In Tester
Cooling System PressureRadiator Cap Adapter
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GATES 31413
🇺🇸 US 🇨🇦 CA
Cooling System PressureRadiator Cap
Fitment notes — GATES 31413
Cooling System PressureRadiator CapSystem Adapter on Tester
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MOTORAD 3003
🇺🇸 US 🇨🇦 CA
StandardIncluded In Tester Kit
Fitment notes — MOTORAD 3003
StandardIncluded In Tester KitRadiator Cap Adapter
Cooling System PressureRadiator Cap Adapter
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This table covers the adapters used to pressure-test this cooling system.

Radiator Cap

Locking Replacement

Brand Part Number Markets Notes Buy
CALORSTAT RC0214
🇺🇸 US 🇨🇦 CA
PerformanceIncludes 2 seals
Fitment notes — CALORSTAT RC0214
PerformanceIncludes 2 sealsLever OpeningMetallic
with A 59 mm (2.32") DiameterPSI - 20.0without Coolant Recovery System
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CALORSTAT RC0217
🇺🇸 US 🇨🇦 CA
PerformanceIncludes 2 seals
Fitment notes — CALORSTAT RC0217
PerformanceIncludes 2 sealsLever OpeningMetallic
PSI - 20.0with Coolant Recovery System
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GATES 31516
🇺🇸 US 🇨🇦 CA
Safety Release Radiator Cap
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MOTORAD ST16V
🇺🇸 US 🇨🇦 CA
Safety Lever
Fitment notes — MOTORAD ST16V
Safety Lever
Relief Pressure 16 lbs
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Standard Replacement

Brand Part Number Markets Notes Buy
ACDELCO Popular RC27
🇺🇸 US 🇨🇦 CA
GM Original Equipmentwith Handle, with Turning Ears
Fitment notes — ACDELCO RC27
GM Original Equipmentwith Handle, with Turning EarsCould be plastic or metal construction
without DEX-Cool LABEL15 LBSMetalBlack
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GATES Popular 31523
🇺🇸 US 🇨🇦 CA
OE Type
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CALORSTAT RC0061
🇺🇸 US 🇨🇦 CA
Includes 2 sealsMetallic
Fitment notes — CALORSTAT RC0061
Includes 2 sealsMetallic
PSI - 15.0
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MOTORAD T16V
🇺🇸 US 🇨🇦 CA
Standard
Fitment notes — MOTORAD T16V
Standard
Relief Pressure 16 lbs
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SKP SK10231
🇺🇸 US 🇨🇦 CA
Pressure Rating 16 psi
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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.

Buying Cooling System Parts for a 2000 Buick Lesabre

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.

  • Confirm you have the 3.8L V6 engine — every part on this page is matched to it.
  • 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 Radiator Cap .

Frequently Asked Questions

How many cooling system parts fit the 2000 Buick Lesabre?

Our catalog currently lists 50 cooling system parts for the 2000 Buick Lesabre across 11 subcategories and 22 brands, covering the 3.8L V6 engine. Each part is matched to the engine(s) it fits.

What are the signs of cooling system problems on a 2000 Buick Lesabre?

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 2000 Buick Lesabre 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 2000 Buick Lesabre?

Every part on this page is matched to the 3.8L V6 engine. 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 2000 Buick Lesabre

Cooling System Parts for Other Buick Lesabre Years

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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.