How do you remove and replace the thermostat in a Cadillac CTS?

To remove and replace the thermostat in a vehicle, disconnect the cable from the negative battery terminal and drain the cooling system. On V6 engine models, loosen the radiator hose clamp and detach the hose. Remove the bolt holding the outlet pipe, oil dipstick tube, and engine lifting bracket, then pull the outlet pipe and O-rings. Remove the intake manifold and the thermostat housing fasteners. Press down on the thermostat and rotate it to clear the locking ears, then remove it. Remove the coolant pipe front and rear fasteners, as well as the pipe to thermostat housing fasteners, and remove the pipes from the thermostat housing. Remove the thermostat cover fasteners, detach the cover and thermostat, remove the cooling fan assembly, and disconnect the radiator hose clamp.

Genuine Cadillac CTS Thermostat

Engine Coolant Thermostat

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12 Thermostats found

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Cadillac CTS Housing Assembly, Eng Cool Therm
Part Number: 12678784
- Replaces: 12647180, 12670209, 12673280
$73.37 MSRP: $154.14
You Save: $80.77 (53%)

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Fits the following Vehicles:
2016-2019 Cadillac CTS | 4 DOOR PERFORMANCE SEDAN, 4 DOOR PLUS SEDAN, 4 DOOR PREMIUM SEDAN | 6 Cyl 3.6L
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Cadillac CTS Thermostat Kit,Engine Coolant
Part Number: 89018168
- Other Name: THERMOSTAT KIT, Engine Coolant Temperature; Thermostat
- Replaces: 89017851
$36.27 MSRP: $73.55
You Save: $37.28 (51%)

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Fits the following Vehicles:
2009-2015 Cadillac CTS | V 2 DOOR COUPE, V 4 DOOR, V 4 DOOR SEDAN, V 4 DOOR WAGON | 8 Cyl 6.2L
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Cadillac CTS Thermostat,Engine Coolant
Part Number: 12600171
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat, Thermostat Unit
- Replaces: 12581595
$20.88 MSRP: $39.42
You Save: $18.54 (48%)

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Fits the following Vehicles:
2004-2007 Cadillac CTS | V 4 DOOR | 8 Cyl 5.7L, 8 Cyl 6.0L
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Cadillac CTS Outlet Assembly, Water Pump (W/Thermostat)
Part Number: 12674634
- Other Name: Outlet Assembly, W/Pmp (W/Therm); Thermostat Housing, Water Outlet
- Replaces: 12670049, 12658723
$77.91 MSRP: $163.66
You Save: $85.75 (53%)

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Fits the following Vehicles:
2016-2019 Cadillac CTS | 4 DOOR V-SERIES SEDAN | 8 Cyl 6.2L
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Cadillac CTS Housing Assembly, Engine Coolant Thermostat
Part Number: 12652328
- Other Name: HOUSING, Engine Coolant Thermostat; Thermostat Housing
- Replaced by: 12706566
$120.23 MSRP: $252.61
You Save: $132.38 (53%)

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Fits the following Vehicles:
2008-2014 Cadillac CTS | 2 DOOR COUPE, 4 DOOR, 4 DOOR (RHD), 4 DOOR RHD, 4 DOOR SEDAN, 4 DOOR SEDAN(RHD), 4 DOOR STATION WAGON, 4 DOOR STATION WAGON(RHD), 4 DOOR WAGON, 4 DOOR WAGON(RHD) | 6 Cyl 3.0L, 6 Cyl 3.6L
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Cadillac CTS Housing Assembly, Eng Cool Therm
Part Number: 25201447
- Replaces: 12651603
$61.64 MSRP: $129.48
You Save: $67.84 (53%)

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Fits the following Vehicles:
2014-2019 Cadillac CTS | 4 DOOR PERFORMANCE SEDAN, 4 DOOR PLUS SEDAN, 4 DOOR PREMIUM SEDAN, 4 DOOR SEDAN | 4 Cyl 2.0L
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Cadillac CTS Housing Assembly, Eng Cool Therm
Part Number: 12706565
- Other Name: Thermostat Housing
- Replaces: 12620254, 12652327, 12638184
$65.84 MSRP: $138.34
You Save: $72.50 (53%)

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Fits the following Vehicles:
2014-2015 Cadillac CTS | 4 DOOR PERFORMANCE SEDAN, 4 DOOR PREMIUM SEDAN, 4 DOOR SEDAN | 6 Cyl 3.6L
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Cadillac CTS Housing Assembly, Eng Cool Therm
Part Number: 12706567
- Other Name: Thermostat Housing
- Replaces: 12573977, 12597255, 12620259, 12584433
$122.10 MSRP: $256.52
You Save: $134.42 (53%)

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Fits the following Vehicles:
2004-2007 Cadillac CTS | 4 DOOR, 4 DOOR RHD, 4 DOOR(RHD), V 4 DOOR | 6 Cyl 2.8L, 6 Cyl 3.6L
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Cadillac CTS Housing Assembly, Engine Coolant Thermostat
Part Number: 12597256
- Other Name: HOUSING, Engine Coolant Thermostat; Thermostat Housing
- Replaces: 12588205, 12620262
$29.65 MSRP: $37.85
You Save: $8.20 (22%)

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Fits the following Vehicles:
2005-2007 Cadillac CTS | 4 DOOR RHD | 6 Cyl 2.8L, 6 Cyl 3.6L
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Cadillac CTS Housing Assembly, Engine Coolant Thermostat
Part Number: 12639905
- Other Name: HOUSING, Engine Coolant Thermostat; Thermostat Housing
- Replaced by: 12690768
$112.48 MSRP: $202.66
You Save: $90.18 (45%)

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More Info
Fits the following Vehicles:
2014-2019 Cadillac CTS | 4 DOOR PREMIUM SEDAN | 6 Cyl 3.6L
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Cadillac CTS Thermostat,Engine Coolant
Part Number: 24420653
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat
More Info
Fits the following Vehicles:
2003-2004 Cadillac CTS | 4 DOOR, 4 DOOR RHD, 4 DOOR(RHD), V 4 DOOR | 6 Cyl 3.2L
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Cadillac CTS Housing,Engine Coolant Thermostat
Part Number: 55353492
- Other Name: HOUSING, Engine Coolant Thermostat
- Replaces: 90502201
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Fits the following Vehicles:
2003-2004 Cadillac CTS | 4 DOOR, 4 DOOR RHD, 4 DOOR(RHD), V 4 DOOR | 6 Cyl 3.2L
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Cadillac CTS Thermostat Parts Questions & Answers

Thermostat Kit,Engine Coolant
89018168
Q: How do you remove and replace the thermostat in a Cadillac CTS?
A: To remove and replace the thermostat in a vehicle, disconnect the cable from the negative battery terminal and drain the cooling system. On V6 engine models, loosen the radiator hose clamp and detach the hose. Remove the bolt holding the outlet pipe, oil dipstick tube, and engine lifting bracket, then pull the outlet pipe and O-rings. Remove the intake manifold and the thermostat housing fasteners. Press down on the thermostat and rotate it to clear the locking ears, then remove it. Remove the coolant pipe front and rear fasteners, as well as the pipe to thermostat housing fasteners, and remove the pipes from the thermostat housing. Remove the thermostat cover fasteners, detach the cover and thermostat, remove the cooling fan assembly, and disconnect the radiator hose clamp.