Thermostat location

2008 CHEVROLET UPLANDER
169,000 MILES • 3.9L • V6 • 2WD • AUTOMATIC
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TED FINLEY
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Gets hot need to replace thermostat.
May 2, 2019 at 5:32 PM
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ASEMASTER6371
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Good evening,

I posted the procedure below and attached a couple of pictures for you to view.

It is a little tight to access but is not that hard.

Roy

Engine Coolant Thermostat Housing Replacement

Tools Required

J 38185 (SA9111E) Hose Clamp Pliers

Removal Procedure

Important: Use the J 38185 (SA9111E) to gently release tension on the hose clamp until the hose clamp lock feature engages allowing removal of the hose.



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1. Drain the cooling system. Refer to Cooling System Draining and Filling (Static Fill LZ9) (See: Cooling System > Removal and Replacement)Cooling System Draining and Filling (Vac-N-Fill) (See: Cooling System > Removal and Replacement).
2. Using the J 38185 release the tension on the hose clamp at the thermostat housing and reposition the clamp.
3. Remove the radiator outlet hose from the thermostat housing.


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4. Remove the thermostat housing bolt/stud.
5. Remove the thermostat housing.
May 2, 2019 at 7:15 PM
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TED FINLEY
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Thank's Roy, this will be of great help to me!
May 3, 2019 at 6:52 AM
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ASEMASTER6371
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You are welcome.

always glad to help.

Roy
May 3, 2019 at 7:37 AM
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TED FINLEY
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still having fan trouble. this is what I have checked: fans come on if I use A/C low speed only . Changed engine cool sensor and hook up plug . if I unplug fan while engine running fan will come on high speed then cut off. Checked relays if using tester hooked to ground and check relay when I touch tester to relay on all three at different times both fan will cone on high speed. I guess I need to know what and what else to do or check. any help would be needed. thanks.
May 3, 2019 at 4:41 PM
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ASEMASTER6371
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Okay, unplug which fan?

The PCM controls the grounds on the relays for the fan based on the reading from the coolant sensor.

Roy
May 3, 2019 at 6:02 PM
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TED FINLEY
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the radiator and A/C cooling fans that cool the radiator then they cool on high speed about 45 seconds. the cooling sensor is new , fans are new. we had one on the other fans not working we checked and one was bad.
May 3, 2019 at 8:02 PM
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ASEMASTER6371
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Okay, did you replace the bad fan?

What temperature thermostat did you use when you replaced the thermostat?

How hot does the motor get?

Roy
May 6, 2019 at 4:22 AM