How to replace the thermostat (LY7) on Buick LaCrosse?

You should start by draining part of the cooling system before beginning Thermostat (LY7) replacement. You must never separate the components within the upper and lower Intake Manifold system. The installation process requires upper Intake Manifold removal alongside lower Intake Manifold extraction. Detach the surge tank hose from the Thermostat position while removing the coolant pipe/Thermostat housing bolt followed by the coolant pipe bolt . The coolant inlet pipe requires removal from the Thermostat housing before discarding the coolant pipe o-ring seal . The first step is to remove all bolts from the Thermostat before pulling out the Thermostat while disposing of the Thermostat seal. Install the Thermostat while using a new Thermostat seal then tighten the Thermostat bolts to 10 nm (89 inch lbs.). First position the coolant pipe together with its new seal on the fasteners (1 and 3). Next connect the surge tank hose correctly to the Thermostat. Install both the upper and lower intake manifolds before completing the cooling system.

OEM Buick LaCrosse Thermostat

Engine Coolant Thermostat

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6 Thermostats found

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Buick LaCrosse Thermostat Unit
Part Number: 24505924
$23.98 MSRP: $47.60
You Save: $23.62 (50%)
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Product Specifications
- Other Name: Thermostat Assembly-Engine Coolant (W/Gasket); Thermostat; Thermostat, Engine Coolant Temperature
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2009 Buick LaCrosse | CX, CXL | 6 Cyl 3.8 L GAS
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Buick LaCrosse Thermostat Unit
Part Number: 12600171
$22.45 MSRP: $42.18
You Save: $19.73 (47%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Thermostat, Engine Coolant Temperature; Thermostat
- Replaces: 12581595
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2008-2009 Buick LaCrosse | Super | 8 Cyl 5.3 L GAS
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Buick LaCrosse Thermostat Housing, Green Line
Part Number: 12597172
$96.09 MSRP: $197.47
You Save: $101.38 (52%)
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Product Specifications
- Other Name: Housing, Engine Coolant Temperature; Engine Coolant Thermostat Housing; Thermostat Housing Cover; Water Manifold; Housing, Engine Coolant Thermostat
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2010-2016 Buick LaCrosse | Base, Convenience, CX, CXL, Leather, Premium | 4 Cyl 2.4 L GAS, 4 Cyl 2.4 L MILD HYBRID EV-GAS (MHEV)
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Buick LaCrosse Thermostat, Green Line
Part Number: 12622410
$67.69 MSRP: $150.82
You Save: $83.13 (56%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Thermostat Assembly-Engine Coolant; Thermostat Kit, Engine Coolant Temperature; Thermostat, Engine Coolant Temperature
- Replaces: 21018811, 55350941, 90537453, 12615097
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2010-2016 Buick LaCrosse | Base, Convenience, CX, CXL, Leather, Premium | 4 Cyl 2.4 L GAS, 4 Cyl 2.4 L MILD HYBRID EV-GAS (MHEV)
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Buick LaCrosse Thermostat Housing
Part Number: 12689039
$73.35 MSRP: $150.72
You Save: $77.37 (52%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Housing, Engine Coolant Temperature; Thermostat Housing Cover; Housing, Engine Coolant Thermostat
- Replaces: 12651113
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2010-2016 Buick LaCrosse | Base, Convenience, CX, CXL, CXS, Leather, Premium, Sport Touring, Touring | 6 Cyl 3.0 L GAS, 6 Cyl 3.6 L FLEX, 6 Cyl 3.6 L GAS
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Buick LaCrosse Thermostat Housing
Part Number: 12597257
Product Specifications
- Other Name: Housing, Engine Coolant Temperature; Thermostat Housing Cover; Water Outlet; Housing, Engine Coolant Thermostat
- Replaces: 12574355
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2008 Buick LaCrosse | CXS | 6 Cyl 3.6 L GAS

Buick LaCrosse Thermostat

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Buick LaCrosse Thermostat Parts Questions & Experts Answers

Thermostat Unit
24505924
Q: How to replace the thermostat (LY7) on Buick LaCrosse?
A: You should start by draining part of the cooling system before beginning Thermostat (LY7) replacement. You must never separate the components within the upper and lower Intake Manifold system. The installation process requires upper Intake Manifold removal alongside lower Intake Manifold extraction. Detach the surge tank hose from the Thermostat position while removing the coolant pipe/Thermostat housing bolt followed by the coolant pipe bolt . The coolant inlet pipe requires removal from the Thermostat housing before discarding the coolant pipe o-ring seal . The first step is to remove all bolts from the Thermostat before pulling out the Thermostat while disposing of the Thermostat seal. Install the Thermostat while using a new Thermostat seal then tighten the Thermostat bolts to 10 nm (89 inch lbs.). First position the coolant pipe together with its new seal on the fasteners (1 and 3). Next connect the surge tank hose correctly to the Thermostat. Install both the upper and lower intake manifolds before completing the cooling system.