How to replace the thermostat in a 4.3L engine on 2005 Chevrolet Express 2500?

To exchange a Thermostat in a 4.3l engine, first remove the air cleaner and duct assembly and also partially drain the coolant and the coolant recovery container. Unplug the Radiator Hose from the Thermostat Housing. Move the bolts secured in the Thermostat Housing to the Thermostat apart; then, remove the Thermostat Housing and the Thermostat also. Sand the gasket mating surfaces and do not install the new Thermostat. Now, connect the Thermostat Housing with the Intake Manifold and bolt it using the bolts that you tighten to a torque of 25 nm (18 ft. Lbs.). Replace the Radiator Hose onto the Thermostat Housing, replace the coolant recovery reservoir, and replace the air cleaner and duct. Top off the cooling system, bleed the air in the system, and lastly, inspect the Thermostat Housing as well as the gasket for any cracks in the cooling system due to coolant leaks.

OEM 2005 Chevrolet Express 2500 Thermostat

Engine Coolant Thermostat

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2005 Chevrolet Express 2500 Thermostat Unit Part Number: 12600171
$24.02 MSRP: $45.12
You Save: $21.10 (47%)
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Product Specifications
- Other Name: Thermostat, Engine Coolant Temperature; Thermostat
- Replaces: 12581595
- Item Weight: 0.50 Pounds
- Item Dimensions: 3.1 x 3.1 x 3.0 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12600171
- Warranty: This genuine part is guaranteed by GM's factory warranty.
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Fits the following 2005 Chevrolet Express 2500 Submodels:
- Base, LS, LT | 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L GAS
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2005 Chevrolet Express 2500 Thermostat Part Number: 12632948
$29.83 MSRP: $56.02
You Save: $26.19 (47%)
ADD TO CART
Product Specifications
- Other Name: Thermostat, Engine Coolant Temperature
- Replaces: 12257859, 12563335, 12557859, 12597583, 12551472
- Item Weight: 1.30 Pounds
- Item Dimensions: 3.0 x 3.1 x 3.1 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12632948
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2005 Chevrolet Express 2500 Submodels:
- Base, LS | 6 Cyl 4.3 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L BI-FUEL, 8 Cyl 5.7 L CNG, 8 Cyl 5.7 L GAS

2005 Chevrolet Express 2500 Thermostat

With a comprehensive array of OEM 2005 Chevrolet Express 2500 Thermostat, from fuel pumps to door handles, our website is a one-stop-shop for your needs. All our genuine 2005 Chevrolet Express 2500 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.

2005 Chevrolet Express 2500 Thermostat Parts and Q&A

Q: How to replace the thermostat in a 4.3L engine on 2005 Chevrolet Express 2500?
A: To exchange a Thermostat in a 4.3l engine, first remove the air cleaner and duct assembly and also partially drain the coolant and the coolant recovery container. Unplug the Radiator Hose from the Thermostat Housing. Move the bolts secured in the Thermostat Housing to the Thermostat apart; then, remove the Thermostat Housing and the Thermostat also. Sand the gasket mating surfaces and do not install the new Thermostat. Now, connect the Thermostat Housing with the Intake Manifold and bolt it using the bolts that you tighten to a torque of 25 nm (18 ft. Lbs.). Replace the Radiator Hose onto the Thermostat Housing, replace the coolant recovery reservoir, and replace the air cleaner and duct. Top off the cooling system, bleed the air in the system, and lastly, inspect the Thermostat Housing as well as the gasket for any cracks in the cooling system due to coolant leaks.