How to replace the engine coolant thermostat (LY7 - Gas, 6 CYL, 3.6L, SFI, V6, Alum) on Cadillac STS?

Start the engine coolant Thermostat (LY7 - Gas, 6 CYL, 3.6L, SFI, V6, Alum) replacement by draining the cooling system partially with cooling system draining and filling (Static Fill) (GE 47716). Separating the upper and lower intake manifolds should be avoided during maintenance. Proceed by taking out both the upper and lower intake manifolds. Begin by disconnecting the surge tank hose from the Thermostat followed by removing a Thermostat housing bolt from the coolant pipe and an upper bolt from the same pipe. Disassemble the coolant inlet pipe and Thermostat by removing the Thermostat bolts before extracting the Thermostat which requires discarding the Thermostat seal. Place the new Thermostat with its fresh seal onto the installation site; then torque the Thermostat bolts to 10 n.m (89 lb in) tension. After installing the new coolant pipe seal and fasteners 2 and 7 you should resume connecting the surge tank hose to the Thermostat. Install the upper Intake Manifold with the lower Intake Manifold after completing the cooling system filling according to cooling system draining and filling (Static Fill) (GE 47716).

OEM Cadillac STS Thermostat

Engine Coolant Thermostat

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7 Thermostats found

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Cadillac STS Thermostat
Part Number: 12601556
$23.22 MSRP: $43.60
You Save: $20.38 (47%)
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Product Specifications
- Other Name: Thermostat, Engine Coolant Temperature; Engine Coolant Thermostat
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006-2009 Cadillac STS | V | 8 Cyl 4.4 L GAS
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Cadillac STS Thermostat
Part Number: 12559807
$46.49 MSRP: $92.28
You Save: $45.79 (50%)
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Product Specifications
- Other Name: Thermostat, Engine Coolant Temperature
- Replaces: 12555811, 12554784, 3531407
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2010 Cadillac STS | Base, Platinum | 8 Cyl 4.6 L GAS
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Cadillac STS Thermostat Housing
Part Number: 12597256
$20.44 MSRP: $37.85
You Save: $17.41 (46%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Housing, Engine Coolant Temperature; Housing, Engine Coolant Thermostat
- Replaces: 12620262, 12588205
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007 Cadillac STS | Base | 6 Cyl 3.6 L GAS
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Cadillac STS Thermostat Housing
Part Number: 12706567
$138.24 MSRP: $284.08
You Save: $145.84 (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: 12584433, 12620259, 12597255, 12573977
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2008 Cadillac STS | Base, Platinum | 6 Cyl 3.6 L GAS
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Cadillac STS Thermostat Housing
Part Number: 12596643
Product Specifications
- Other Name: Housing, Engine Coolant Thermostat; Thermostat Housing Cover
- Replaces: 12569097
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2010 Cadillac STS | Base, Platinum | 8 Cyl 4.6 L GAS
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Cadillac STS Thermostat
Part Number: 12586468
Product Specifications
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2006 Cadillac STS | Base | 6 Cyl 3.6 L GAS
View related parts
Cadillac STS Thermostat Housing
Part Number: 12590759
Product Specifications
- Other Name: Housing, Engine Coolant Temperature; Thermostat Housing Cover; Housing, Engine Coolant Thermostat
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006-2009 Cadillac STS | V | 8 Cyl 4.4 L GAS

Cadillac STS Thermostat

Our website offers an extensive catalog of genuine Cadillac STS Thermostat at unbeatable prices. Every OEM Cadillac STS Thermostat comes with a manufacturer's warranty, an easy return policy, and rapid delivery service. Don't miss out on this great opportunity!

Cadillac STS Thermostat Parts Questions & Experts Answers

Thermostat
12559807
Q: How to replace the engine coolant thermostat (LY7 - Gas, 6 CYL, 3.6L, SFI, V6, Alum) on Cadillac STS?
A: Start the engine coolant Thermostat (LY7 - Gas, 6 CYL, 3.6L, SFI, V6, Alum) replacement by draining the cooling system partially with cooling system draining and filling (Static Fill) (GE 47716). Separating the upper and lower Intake Manifolds should be avoided during maintenance. Proceed by taking out both the upper and lower intake manifolds. Begin by disconnecting the surge tank hose from the Thermostat followed by removing a Thermostat housing bolt from the coolant pipe and an upper bolt from the same pipe. Disassemble the coolant inlet pipe and Thermostat by removing the Thermostat bolts before extracting the Thermostat which requires discarding the Thermostat seal. Place the new Thermostat with its fresh seal onto the installation site; then torque the Thermostat bolts to 10 n.m (89 lb in) tension. After installing the new coolant pipe seal and fasteners 2 and 7 you should resume connecting the surge tank hose to the Thermostat. Install the upper Intake Manifold with the lower Intake Manifold after completing the cooling system filling according to cooling system draining and filling (Static Fill) (GE 47716).