How to replace a thermostat in a cooling system?

To address cooling issues, first inspect the coolant level, drivebelt, and temperature gauge. A slow-warming engine suggests an open thermostat, while an overheated engine with a cool upper radiator hose indicates a closed thermostat. Avoid running vehicles without thermostats due to emission and fuel concerns. For thermostat replacement: disconnect the battery, drain the cooling system, and access the thermostat via the upper radiator hose. Detach the hose, and, depending on the engine, possibly relieve fuel pressure or remove heater brackets. Remove the thermostat cover and old thermostat. Clean the surfaces, replace the gasket or use RTV sealant as needed, and install the new thermostat. Reconnect components, refill and bleed the cooling system. Run the engine, ensuring no leaks and correct thermostat function.

Genuine Pontiac Grand Prix Thermostat

Engine Coolant Thermostat

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7 Thermostats found

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Pontiac Grand Prix Thermostat Assembly, Engine Coolant (W/ Gasket)
Part Number: 24505924
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat, Thermostat Unit
$17.65 MSRP: $35.82
You Save: $18.17 (51%)

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Fits the following Vehicles:
1998-2008 Pontiac Grand Prix | 4 DOOR, GT 2 DOOR, GT 4 DOOR, GT2 4 DOOR, GTP 2 DOOR, GTP 4 DOOR, GXP 4 DOOR, SE 4 DOOR | 6 Cyl 3.8L
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Pontiac Grand Prix Thermostat,Engine Coolant
Part Number: 24507563
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat
- Replaces: 10182343, 3091114, 10226109, 03091114
$18.21 MSRP: $36.96
You Save: $18.75 (51%)

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Fits the following Vehicles:
1988-2003 Pontiac Grand Prix | 2 DOOR, 4 DOOR, GT 2 DOOR, GT 4 DOOR, GTP 2 DOOR, GTP 4 DOOR, LE 2 DOOR, LE 4 DOOR, SE 2 DOOR, SE 4 DOOR, STE 4 DOOR | 6 Cyl 2.8L, 6 Cyl 3.1L, 6 Cyl 3.4L
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Pontiac Grand Prix 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:
2005-2008 Pontiac Grand Prix | 4 DOOR, GT 4 DOOR, GT2 4 DOOR, GTP 4 DOOR, GXP 4 DOOR | 8 Cyl 5.3L
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Pontiac Grand Prix Thermostat,Engine Coolant
Part Number: 12514334
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat
$12.58 MSRP: $22.56
You Save: $9.98 (45%)

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Fits the following Vehicles:
1982-1987 Pontiac Grand Prix | 2 DOOR, 4 DOOR, BROUGHAM 2 DOOR, LE 2 DOOR, STATION WAGON | 6 Cyl 3.8L, 6 Cyl 4.1L, 8 Cyl 5.0L
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Pontiac Grand Prix Thermostat,Engine Coolant
Part Number: 22545290
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat
$5.85 MSRP: $11.34
You Save: $5.49 (49%)

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Fits the following Vehicles:
1990-1991 Pontiac Grand Prix | 2 DOOR, 4 DOOR, GT 2 DOOR, LE 2 DOOR, SE 2 DOOR, SE 4 DOOR, STE 4 DOOR | 4 Cyl 2.3L
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Pontiac Grand Prix Thermostat,Engine Coolant
Part Number: 10207373
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat
$10.70 MSRP: $19.20
You Save: $8.50 (45%)

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More Info
Fits the following Vehicles:
1986-1987 Pontiac Grand Prix | 2 DOOR, 4 DOOR, BROUGHAM 2 DOOR, LE 2 DOOR | 6 Cyl 4.3L
1982-1983 Pontiac Grand Prix | 2 DOOR, 4 DOOR, STATION WAGON | 8 Cyl 5.7L Diesel
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Pontiac Grand Prix Thermostat Assembly, Engine Coolant
Part Number: 24504169
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat
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Fits the following Vehicles:
1996 Pontiac Grand Prix | 2 DOOR, 4 DOOR, GT 2 DOOR, SE 2 DOOR, SE 4 DOOR | 6 Cyl 3.4L
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Pontiac Grand Prix Thermostat Parts Questions & Answers

Thermostat,Engine Coolant
24507563
Q: How to replace a thermostat in a cooling system?
A: To address cooling issues, first inspect the coolant level, drivebelt, and temperature gauge. A slow-warming engine suggests an open thermostat, while an overheated engine with a cool upper radiator hose indicates a closed thermostat. Avoid running vehicles without thermostats due to emission and fuel concerns. For thermostat replacement: disconnect the battery, drain the cooling system, and access the thermostat via the upper radiator hose. Detach the hose, and, depending on the engine, possibly relieve fuel pressure or remove heater brackets. Remove the thermostat cover and old thermostat. Clean the surfaces, replace the gasket or use RTV sealant as needed, and install the new thermostat. Reconnect components, refill and bleed the cooling system. Run the engine, ensuring no leaks and correct thermostat function.