Hummer H2 For those who like a little more gleam to their Hummer, the H2 offers a similar rugged look as the H1, but as a lower cost, and with more added features, making it almost a massive luxury SUV.

Hummer H2 with Cummins 6bt power steering fluid question

  #1  
Old 06-05-2019, 05:07 PM
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Default Hummer H2 with Cummins 6bt power steering fluid question

Greetings everyone.

As the title states, I have a 2004 Hummer H2 with a cummins diesel conversion. I am in the process of replacing the power steering pump and would like to flush the system. I'm just not sure if I should use what GM or Cummins recommends as they can be different.

I want to use GM recommendations as it is "power steering fluid" as opposed to atf for cummins.

thanks
 
  #2  
Old 06-06-2019, 07:07 AM
fastNYsix's Avatar
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I have ran atf in my GM vehicles before without issue. Can you post some pics of your H2 please? I'm interested in this swap.
 
  #3  
Old 06-06-2019, 07:19 AM
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Both fluids will work fine. I use the PS fluid because it's normally cheaper than ATF
 
  #4  
Old 06-06-2019, 09:57 AM
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some say power steering fluid takes a bit more heat from the hydro boost system than transmission fluid will but i do not know if that is a real concern.
 
  #5  
Old 06-07-2019, 08:20 PM
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Originally Posted by bronxteck View Post
some say power steering fluid takes a bit more heat from the hydro boost system than transmission fluid will but i do not know if that is a real concern.

Thank you for your replies - I have atf from my tranny fluid change so i'll use that.

I picked the hummer up as a runner with many problems to solve. A Duramax diesel conversion seems more plug and play whereas the cummins is pure caveman!!!
 
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