How to replace the engine coolant thermostat (LY7, LLT) on Cadillac CTS?

Start by partially draining the cooling system through the cooling system draining and filling (GE 47716) procedure when replacing the engine coolant Thermostat (LY7, LLT). After removing the upper Intake Manifold and disconnecting the surge tank outlet pipe from the Thermostat focus on the radiator surge tank outlet hose/pipe replacement (LLT) procedures. Remove the Thermostat's three hardware components starting with the coolant pipe/Thermostat housing bolt then the coolant pipe upper bolt and finally the coolant inlet pipe. To remove the Thermostat you must first remove the Thermostat bolts before discarding the Thermostat seal. Fasten the new Thermostat by applying new Thermostat seal then tighten the Thermostat bolts to a torque of 10 n.m (89 lb in). Verna with a new seal along with fasteners (2 and 7) to reinstall the coolant pipe before you connect the surge tank outlet pipe to the Thermostat and install the upper Intake Manifold. Complete cooling system filling based on the cooling system draining and filling (GE 47716) procedure.

OEM Cadillac CTS Thermostat

Engine Coolant Thermostat

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11 Thermostats found

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Cadillac CTS Thermostat Part Number: 89018168
$36.41 MSRP: $72.25
You Save: $35.84 (50%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Engine Coolant Thermostat; Thermostat, Engine Coolant Temperature
- Replaces: 89017851
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2009-2015 Cadillac CTS | V | 8 Cyl 6.2 L GAS
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Cadillac CTS Thermostat Part Number: 24420653
$12.99 MSRP: $29.42
You Save: $16.43 (56%)
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Product Specifications
- Other Name: Thermostat, Engine Coolant Temperature
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2003-2004 Cadillac CTS | Base, Luxury, Luxury Sport | 6 Cyl 3.2 L GAS
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Cadillac CTS Thermostat Housing Part Number: 12678784
$47.49 MSRP: $88.60
You Save: $41.11 (47%)
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Product Specifications
- Other Name: Housing, Engine Coolant Temperature; Thermostat Housing Cover; Thermostat Gasket; Thermostat Unit; Housing, Engine Coolant Thermostat
- Replaced by: 12741007
- Replaces: 12673280, 12647180, 12670209
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2016-2019 Cadillac CTS | Luxury, Premium, Premium Luxury | 6 Cyl 3.6 L GAS
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Cadillac CTS Thermostat Housing Part Number: 12674634
$79.65 MSRP: $163.66
You Save: $84.01 (52%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Outlet Assembly-Water Pump (W/Thermostat); Thermostat Housing Cover; Water Outlet; Outlet, Engine Coolant Pump
- Replaces: 12658723, 12670049
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2016-2019 Cadillac CTS | V | 8 Cyl 6.2 L GAS
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Cadillac CTS Thermostat Unit Part Number: 12600171
$24.02 MSRP: $45.12
You Save: $21.10 (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:
- 2004-2007 Cadillac CTS | V | 8 Cyl 5.7 L GAS, 8 Cyl 6.0 L GAS
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Cadillac CTS Thermostat Housing Part Number: 25201447
$67.81 MSRP: $139.32
You Save: $71.51 (52%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Housing, Engine Coolant Temperature; Thermostat Housing Cover; Thermostat Gasket; Thermostat; Thermostat Cover; Water Inlet; Housing, Engine Coolant Thermostat
- Replaces: 12651603
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2019 Cadillac CTS | Base, Luxury, Performance, Premium | 4 Cyl 2.0 L GAS
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Cadillac CTS Thermostat Housing Part Number: 12706567
$141.01 MSRP: $289.76
You Save: $148.75 (52%)
Ships in 1-2 Business Days
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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:
- 2008-2009 Cadillac CTS | Base | 6 Cyl 3.6 L GAS
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Cadillac CTS Thermostat Housing Part Number: 12706565
$72.43 MSRP: $148.84
You Save: $76.41 (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: 12638184, 12620254, 12652327
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2016 Cadillac CTS | Luxury, Performance, Premium | 6 Cyl 3.6 L FLEX, 6 Cyl 3.6 L GAS
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Cadillac CTS Thermostat Part Number: 12620250
Product Specifications
- Other Name: Cover
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2008 Cadillac CTS | Base | 6 Cyl 3.6 L GAS
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Cadillac CTS Thermostat Part Number: 12586468
Product Specifications
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2007 Cadillac CTS | Base | 6 Cyl 2.8 L GAS, 6 Cyl 3.6 L GAS
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Cadillac CTS Thermostat Housing Part Number: 55353492
Product Specifications
- Other Name: Housing, Engine Coolant Thermostat; Thermostat Housing Cover; Thermostat Housing Gasket; Thermostat
- Replaces: 90502201
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2003-2004 Cadillac CTS | Base, Luxury, Luxury Sport | 6 Cyl 3.2 L GAS

Cadillac CTS Thermostat

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Cadillac CTS Thermostat is one of the car parts that is relevant to the cooling system, commonly located in closeness to the radiator. Although its main purpose is to cool the engine in order for it to perform well, it does plays other important roles. The typical thermostats are the closed-loop control devices that categorize the heat transfer fluids with the help of the set temperature. There have been different types of thermostats used in the past, basic thermostats like the bimetallic strip type, wax pellet type and the pneumatic thermostats. These developments have greatly helped boost the capacities to cool and heat car systems which not only comforts more and perform better.

Cadillac CTS Thermostat Parts Questions & Experts Answers

Thermostat Housing
12706567
Q: How to replace the engine coolant thermostat (LY7, LLT) on Cadillac CTS?
A:
Start by partially draining the cooling system through the cooling system draining and filling (GE 47716) procedure when replacing the engine coolant Thermostat (LY7, LLT). After removing the upper Intake Manifold and disconnecting the surge tank outlet pipe from the Thermostat focus on the radiator surge tank outlet hose/pipe replacement (LLT) procedures. Remove the Thermostat's three hardware components starting with the coolant pipe/Thermostat housing bolt then the coolant pipe upper bolt and finally the coolant inlet pipe. To remove the Thermostat you must first remove the Thermostat bolts before discarding the Thermostat seal. Fasten the new Thermostat by applying new Thermostat seal then tighten the Thermostat bolts to a torque of 10 n.m (89 lb in). Verna with a new seal along with fasteners (2 and 7) to reinstall the coolant pipe before you connect the surge tank outlet pipe to the Thermostat and install the upper Intake Manifold. Complete cooling system filling based on the cooling system draining and filling (GE 47716) procedure.