Question about 2005 Hummer H2

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2005 H2 SUT problems

I have a 2005 H2 SUT modified...magnuson supercharger. The serpentine belts break and the rebuilt transmission overheats. The transmission was rebuilt to handle the extra torque, why is this happening? Help me please!!!
This Hummer has 6" lift (Bullet Proof) with 40" tires. The engine also gets hot....is this because of the supercharger? What can I do?
Because I am a girl...mechanics see me coming and I swear they yell "quick, take her money and run" LOL...kidding or not, that is how I feel...they take me for stupid and all I am getting is the run around.

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How often is the belt breaking? excess revolutions can cause premature wear. flushing the cooling system with the proper cleaners, refilling with dexcool and DISTILLED water can reduce the engine temp in h1's by at least 10 degrees in the desert. this i have done. also if the cooler for the transmission has not been upgraded to handle the new trans you will still get an overheat. you can also put a electric fan on the trans cooler. the belt may not be aligned properly.

Posted on Nov 02, 2009

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Posted on Jan 02, 2017

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Hello! I'm not sure if you have the supercharged, or non-supercharged version of the 3.8 liter V6 - so I've posted both for you.

Supercharged L67 motor - Supercharger belt:



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Supercharged L67 motor - Accessory drive belt:

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Non-Supercharged L36 motor:


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Hope this helps, and thanks for using FixYa!

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