The Ultimate Guide to Replacing Thermostat & Lower Radiator Hose

How to replace the thermostat, lower radiator hose, and coolant antifreeze.
For all of you that like to work on your own vehicles, you might run across a time when you need to change your thermostat. On the Hummer H3, 3.7L, I5 engine, it is just as easy to replace the lower radiator hose at the same time. During this whole process, you will end up changing out the coolant at the same time. Consider the coolant as standard maintenance. My video can guide you to do it yourself. This DIY was performed on a 2009 Hummer H3T Truck with a 3.7 liter, I5.
I would rate the difficulty as 2.5 out of 5 🔧. Fairly straightforward with the correct tools.
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[@charosenz]

great vid. Thanks. Also glad you did not add annoying music that too many other vid makers do.

[@DIYNationTH]

No problem! Thanks for watching. Hope it helped.

[@emmittosborne7654]

I watched several videos on doing this task, and by far, your guide was the best and most complete. Thank you for putting this great video together!

[@DIYNationTH]

You are very welcome and glad it helped you out.

[@donp2474]

Really good and helpful video and instruction.

[@DIYNationTH]

I appreciate that. I'm glad I could help.

[@maxellison55]

Good job. Thanks for the video and good luck!

[@DIYNationTH]

Thanks!

[@f296877]

Great video thanks!

[@DIYNationTH]

You are very welcome.

[@zooyl4110]

This video is really useful. TYSM.

[@DIYNationTH]

You're welcome!

[@darrenw.taylor2084]

Great video! Thank you for sharing this information!

[@DIYNationTH]

Glad it was helpful!

[@sr-vx1cg]

bel lavoro,grazie per il video

[@DIYNationTH]

You are welcome!

[@thiagolemao]

Excelent tks

[@DIYNationTH]

Thanks!

[@USMC-Sniper-0137]

Annnnnnd after removing the skid plate, oh look! I can get to the lower hose now from underneath the car.......

[@DIYNationTH]

Sure can.

[@saeedreslan]

Hi do you bleed the air from the system

[@DIYNationTH]

I make sure the truck is level or slight incline from the front. Let it idle long enough for the thermostat to open up. Make sure the heater is on and blowing inside the cab. Keep pouring coolant in until it's level with the neck of the radiator. Fill overflow tank to full level after driving on level surface.

[@richardmccarrell200]

how much coolant does it take

[@DIYNationTH]

About 2 Gallons. Get 3 just to be safe. 50/50 mix

[@ironfistarrival]

You should show the process while you are actually removing them the parts one by one ,but you are showing the removed parts after you have removed them without us being able to see how you removed them step by step , just would be better to show all the details .

[@DIYNationTH]

Yes, I agree with you. I've been getting better at the videos from when I first started. I need to get a tripod as my extra helper.