How to check and replace a thermostat in a cooling system on Saturn LS and LS1?

Before replacing the thermostat, inspect the coolant level, drive belt tension, and temperature gauge operation. In 2004 models, remove the exhaust manifold heat shield, drain the coolant, remove the thermostat cover, and replace the thermostat. For V6 models, remove the intake manifold, and disconnect the radiator hose.

Genuine Saturn LS Thermostat

Engine Coolant Thermostat

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4 Thermostats found

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Saturn LS Thermostat Assembly, Engine Coolant
Part Number: 12622410
$77.07 MSRP: $156.38
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Product Specifications
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat
- Replaces: 21018811, 90537453, 55350941, 12615097
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2000 Saturn LS | LS, LS1, LS2, LW1, LW2 | 4 Cyl 2.2L
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Saturn LS Thermostat,Engine Coolant
Part Number: 24420653
Product Specifications
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2000 Saturn LS | LS, LS1, LS2, LW1, LW2 | 6 Cyl 3.0L
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Saturn LS Housing,Engine Coolant Thermostat
Part Number: 55353492
Product Specifications
- Other Name: HOUSING, Engine Coolant Thermostat
- Replaces: 90502201
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2000 Saturn LS | LS, LS1, LS2, LW1, LW2 | 6 Cyl 3.0L
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Saturn LS Housing Asm,Engine Coolant Thermostat
Part Number: 90537819
Product Specifications
- Other Name: HOUSING, Engine Coolant Thermostat; Inlet Assembly
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2000 Saturn LS | LS, LS1, LS2, LW1, LW2 | 4 Cyl 2.2L

Saturn LS Thermostat Parts Questions & Experts Answers

Thermostat,Engine Coolant
24420653
Q: How to check and replace a thermostat in a cooling system on Saturn LS and LS1?
A: Before replacing the thermostat, inspect the coolant level, drive belt tension, and temperature gauge operation. In 2004 models, remove the exhaust manifold heat shield, drain the coolant, remove the thermostat cover, and replace the thermostat. For V6 models, remove the intake manifold, and disconnect the radiator hose.