How to replace thermostat.

YULIANRG

MEMBER
2004 GMC SAVANA
4.3L
V6
RWD
AUTOMATIC
180,000 MILES

I have code P0134.

Sunday, January 17th, 2016 AT 5:29 AM

5 Replies

WRENCHTECH

MECHANIC
20,761 POSTS

What does a P0134 have to do with a thermostat?

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Sunday, January 17th, 2016 AT 6:22 AM

YULIANRG

MEMBER
6 POSTS

Sorry P0128.

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Sunday, January 17th, 2016 AT 6:24 AM

WRENCHTECH

MECHANIC
20,761 POSTS

No engine size listed

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Sunday, January 17th, 2016 AT 6:26 AM

YULIANRG

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6 POSTS

4.3 v6

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Sunday, January 17th, 2016 AT 6:27 AM

WRENCHTECH

MECHANIC
20,761 POSTS

Thermostat Replacement (4.3L)

Removal Procedure

Remove the air cleaner and the duct assembly.
Partially drain the coolant.
Remove the coolant recovery reservoir.
Disconnect the radiator hose from the thermostat housing.

https://www.2carpros.com/images/external/113304386.jpg.gif

Remove the bolts attaching the thermostat housing to the thermostat.
Remove the thermostat housing.
Remove the thermostat.
Clean the gasket mating surfaces.

Installation Procedure

Notice: Refer to Coolant Addition Notice in Service Precautions.

Install the thermostat.
Install the thermostat housing to the intake manifold.
Notice: Refer to Fastener Notice in Service Precautions.

Install the bolts to the housing.

Tighten the bolts to 25 Nm (18 ft. lbs.) .

Connect the radiator hose to the thermostat housing.
Install the coolant recovery reservoir.
Install the air cleaner and the duct.
Refill the cooling system.
Bleed the air from the cooling system.
Inspect the thermostat housing and the gasket for coolant leaks.