How to replace the engine coolant thermostat (LY7 - Gas, 6 CYL, 3.6L, SFI, V6, Alum) on 2008 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 2008 Cadillac STS Thermostat

Engine Coolant Thermostat

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5 Thermostats found

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2008 Cadillac STS Thermostat Part Number: 12601556
$23.22 MSRP: $43.60
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Product Specifications
- Other Name: Thermostat, Engine Coolant Temperature; Engine Coolant Thermostat
- Item Weight: 0.60 Pounds
- Item Dimensions: 4.4 x 4.2 x 4.3 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12601556
- Warranty: This genuine part is guaranteed by GM's factory warranty.
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Fits the following 2008 Cadillac STS Submodels:
- V | 8 Cyl 4.4 L GAS
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2008 Cadillac STS Thermostat Part Number: 12559807
$47.41 MSRP: $94.12
You Save: $46.71 (50%)
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Product Specifications
- Other Name: Thermostat, Engine Coolant Temperature
- Replaces: 12555811, 12554784, 3531407
- Item Weight: 0.60 Pounds
- Item Dimensions: 3.0 x 3.2 x 3.0 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12559807
- Warranty: This genuine part is guaranteed by GM's factory warranty.
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Fits the following 2008 Cadillac STS Submodels:
- Base, Platinum | 8 Cyl 4.6 L GAS
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2008 Cadillac STS Thermostat Housing Part Number: 12706567
$141.01 MSRP: $289.76
You Save: $148.75 (52%)
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Product Specifications
- Other Name: Housing, Engine Coolant Temperature; Thermostat Housing Cover; Housing, Engine Coolant Thermostat
- Replaces: 12584433, 12620259, 12597255, 12573977
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12706567
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following 2008 Cadillac STS Submodels:
- Base, Platinum | 6 Cyl 3.6 L GAS
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2008 Cadillac STS Thermostat Housing Part Number: 12596643
Product Specifications
- Other Name: Housing, Engine Coolant Thermostat; Thermostat Housing Cover
- Replaces: 12569097
- Item Weight: 1.30 Pounds
- Item Dimensions: 6.1 x 6.2 x 4.1 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12596643
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2008 Cadillac STS Submodels:
- Base, Platinum | 8 Cyl 4.6 L GAS
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2008 Cadillac STS Thermostat Housing Part Number: 12590759
Product Specifications
- Other Name: Housing, Engine Coolant Temperature; Thermostat Housing Cover; Housing, Engine Coolant Thermostat
- Item Weight: 0.80 Pounds
- Item Dimensions: 6.3 x 4.3 x 4.2 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12590759
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2008 Cadillac STS Submodels:
- V | 8 Cyl 4.4 L GAS

2008 Cadillac STS Thermostat

With a comprehensive array of OEM 2008 Cadillac STS Thermostat, from fuel pumps to door handles, our website is a one-stop-shop for your needs. All our genuine 2008 Cadillac STS Thermostat are backed by the manufacturer's warranty and are offered at competitive prices in the market. Rest assured, you can shop with complete confidence.

2008 Cadillac STS Thermostat Parts and Q&A

Q: How to replace the engine coolant thermostat (LY7 - Gas, 6 CYL, 3.6L, SFI, V6, Alum) on 2008 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).