2006 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 2006 Buick Lacrosse come from 6 brands — PRESTONE, PEAK, VALVOLINE and 3 other brands. The "Popular" part is FVP MV5050GAL. Every part fits both the 3.6L V6 and the 3.8L 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 bleeders used to purge air from the coolant circuit. Read more

One part is listed for the 2006 Buick Lacrosse — DORMAN 902112.

This table covers the Coolant filler necks. Read more

2 Coolant Filler Neck parts are listed for the 2006 Buick Lacrosse, from DORMAN and GM GENUINE.

This group includes DORMAN 9022133 and GM GENUINE 10344426.

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

2 Coolant Hose / Pipe parts for the 2006 Buick Lacrosse come from GM GENUINE.

Part numbers include GM GENUINE 12565082 and GM GENUINE 24503423.

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 are listed for the 2006 Buick Lacrosse, from GM GENUINE, FEL-PRO and MAHLE / CLEVITE.

Listed part numbers: FEL-PRO 36021, GM GENUINE 12623519 and GM GENUINE 1534066, plus the other parts above.

This table covers the Coolant Hose Connector flanges. Read more

This group shows a single part: FOUR SEASONS 86500.

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

6 Coolant Reservoir parts are listed for the 2006 Buick Lacrosse, from TECHPRO, DORMAN, GM GENUINE and 2 other brands. DORMAN 603668 carries the "Popular" badge. 3 parts fit every engine; the other 3 are engine-specific.

Part numbers include DORMAN 603668, GM GENUINE 20917050 and GPD 2411201, among others listed 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

3 Coolant Reservoir Cap parts are listed for the 2006 Buick Lacrosse, from CALORSTAT, DORMAN and MOTORAD. All of them fit every engine offered in the 2006 Lacrosse.

Listed part numbers: CALORSTAT RC0147, DORMAN 82724 and MOTORAD T167.

This table covers the Cooling Fan control modules. Read more

US MOTOR WORKS supplies the 3 Cooling Fan Control Module parts for the 2006 Buick 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

4 Cooling System Tester Adapter parts for the 2006 Buick Lacrosse come from 2 brands — GATES and MOTORAD. Every part fits both the 3.6L V6 and the 3.8L V6.

Part numbers include GATES 31431, GATES 31391 and MOTORAD 3128, 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

17 Radiator parts for the 2006 Buick Lacrosse come from 9 brands — DENSO, FVP, TYC and 6 other brands. The "Popular" part is CSF 3262.

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 2006 Buick Lacrosse come from 3 brands — ACDELCO, GATES and MOTORAD. Every part fits both the 3.6L V6 and the 3.8L V6.

This group includes ACDELCO RC85, GATES 31532 and MOTORAD T46.

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

One part is listed for the 2006 Buick Lacrosse — DORMAN 61136.

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

15 Radiator Fan Assembly parts are listed for the 2006 Buick Lacrosse, from VDO / CONTINENTAL, UAC, GPD and 5 other brands. TYC 621420 carries the "Popular" badge.

Economy: 3 parts, from GPD and TECHPRO. A representative part number is GPD 2811643.

The Standard Replacement section: 12 options from VDO / CONTINENTAL, UAC, TYC and 3 other brands. TYC 621420 is listed in this group.

This table covers the Radiator Fan blades. Typical signs include chatter, streaks, or a skip at the top of the stroke. Confirm left and right lengths in the notes — they are often different. Read more

One part is listed for the 2006 Buick Lacrosse — GM GENUINE 1580593.

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

4 Radiator Fan Motor parts for the 2006 Buick Lacrosse come from 3 brands — VDO / CONTINENTAL, FOUR SEASONS and GM GENUINE.

This group includes FOUR SEASONS 35081, GM GENUINE 1580641 and VDO / CONTINENTAL PM9244 and the remaining 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

15 Radiator Hose parts are listed for the 2006 Buick Lacrosse, from CONTINENTAL, DAYCO, GATES and 1 other brand. DAYCO 72274 carries the "Popular" badge.

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

DORMAN supplies both parts for the 2006 Buick Lacrosse. All of them fit every engine offered in the 2006 Lacrosse.

This group includes DORMAN 700579 and DORMAN 961359.

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

40 Temperature Sender / Sensor parts for the 2006 Buick Lacrosse come from 19 brands — STANDARD MOTOR PRODUCTS, NTK, WALKER PRODUCTS and 16 other brands. The "Popular" part is NTK EF0008. Economy, Full Service Kit and Standard Replacement are all represented, and Standard Replacement alone accounts for 25 parts.

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

18 Thermostat parts are listed for the 2006 Buick Lacrosse, from MOTORAD, GATES, SKP and 4 other brands. MOTORAD 5239192 carries the "Popular" badge. 1 part fits every engine; the other 17 are engine-specific.

Economy: 1 part, from SKP. A representative part number is SKP SK9022100.

The Heavy Duty section lists 2 options from MOTORAD — rated for severe service. MOTORAD 5239192 is listed in this group.

The Premium section: 3 options from MOTORAD. MOTORAD 7239192 is listed in this group.

The Standard Replacement section: 12 options from MOTORAD, GATES, GM GENUINE and 3 other brands. GATES 34163 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

26 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 2006 Buick Lacrosse come from 8 brands — FEL-PRO, VICTOR REINZ, GM GENUINE and 5 other brands. The "Popular" part is FEL-PRO 35855. A list this long means Thermostat / Thermostat Housing / Water Outlet Seal applications vary by configuration — the notes carry the qualifiers.

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

6 Thermostat Housing / Water Outlet parts are listed for the 2006 Buick Lacrosse, from DORMAN, GPD, FOUR SEASONS and 2 other brands.

Economy: 3 parts, from DORMAN and GPD. A representative part number is DORMAN 9022098.

The Standard Replacement section: 3 options from FOUR SEASONS, GATES and MOTORAD. FOUR SEASONS 85167 is listed in this group.

Listed part numbers: DORMAN 9022098, DORMAN 9022001 and GPD 8241409, plus the other parts 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

25 Water Pump parts are listed for the 2006 Buick Lacrosse, from GM GENUINE, DAYCO, SKP and 11 other brands. BECK/ARNLEY 1312378 carries the "Popular" badge.

Economy: 11 parts, from SKP, US MOTOR WORKS, FVP and 4 other brands. A representative part number is BECK/ARNLEY 1312378.

The Standard Replacement section: 14 options from GM GENUINE, DAYCO, ACDELCO and 4 other brands. ACDELCO 252693 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

10 Water Pump Gasket parts for the 2006 Buick Lacrosse come from 5 brands — FEL-PRO, GM GENUINE, APEX and 2 other brands. The "Popular" part is FEL-PRO 35804.

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 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

One part is listed for the 2006 Buick Lacrosse — GM GENUINE 12691259.