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.

Driving H2 into remote places ( spare parts lost )

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Old Aug 16, 2025 | 10:17 PM
  #21  
Mark R's Avatar
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Originally Posted by bronxteck
inside of the rear disc drums. you need to remove the rotors to adjust the pads.why they didnt just make an inspection hole on the face of the rotor or on the backing plate blows my mind. you adjust it as you would drum brakes.

It helps If you pick up a set of Brake Adjusting Large Size Calipers. In the H2 Manual it shows measuring the Rotor Drum and then setting the E brake shoes to the spec.
I have a set for my h2. Here's the Link. And Bronxteck is right.....it blows my mind also. L.O.L.

Amazon Amazon
 
Old Aug 16, 2025 | 10:24 PM
  #22  
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Originally Posted by Mark R
It helps If you pick up a set of Brake Adjusting Large Size Calipers. In the H2 Manual it shows measuring the Rotor Drum and then setting the E brake shoes to the spec.
I have a set for my h2. Here's the Link. And Bronxteck is right.....it blows my mind also. L.O.L.

https://www.amazon.com/GearWrench-33...0002SQUJ0?th=1
thank you sir
 
Old Aug 17, 2025 | 09:14 AM
  #23  
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Didn't see what year H2 you purchased.... If it's a 2003 model, get the often neglected fuel filter changed and carrier replacement. It's at the very front of the fuel tank above a crossmember.

Later models did not have the fuel filter, only the filter sock in the tank at the fuel pump.

I would also carry an extra serpentine belt.

On a full size bronco I have overheated and boiled over the power steering fluid after 2 or 3 hours driving around near Moab Utah. Basically the constant left and right forces on the tires from an even road work against the power steering pump and produce heat. That was solved by going with a larger power steering cooler.... Something to consider on the H2, would be to upgrade that power steering cooler with as much as off-road you plan on doing. At a minimum I would change the power steering fluid with a full synthetic for added protection in the heat. A good reference for an adequate cooler would be to look at the size of the one on the H1 and upgrade accordingly.
 
Old Aug 17, 2025 | 09:20 AM
  #24  
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Originally Posted by RobertDez
Didn't see what year H2 you purchased.... If it's a 2003 model, get the often neglected fuel filter changed and carrier replacement. It's at the very front of the fuel tank above a crossmember.

Later models did not have the fuel filter, only the filter sock in the tank at the fuel pump.

I would also carry an extra serpentine belt.

On a full size bronco I have overheated and boiled over the power steering fluid after 2 or 3 hours driving around near Moab Utah. Basically the constant left and right forces on the tires from an even road work against the power steering pump and produce heat. That was solved by going with a larger power steering cooler.... Something to consider on the H2, would be to upgrade that power steering cooler with as much as off-road you plan on doing. At a minimum I would change the power steering fluid with a full synthetic for added protection in the heat. A good reference for an adequate cooler would be to look at the size of the one on the H1 and upgrade accordingly.
my H2 is 2004, 200.000 miles on the vehicle,
the last owner meticulously maintained the vehicle at the GMC dealer,
interior looks brand new
body looks brand new, I don’t know how this person drove 200.000 miles without one ding on the body or scratch in the interior.

i changed the belt yesterday
someone added external PS cooler already.



 
Old Aug 17, 2025 | 10:17 AM
  #25  
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Hey Overland...you mentioned...
I got the side steps out
but did you reinstall the factory Rock Rails Under the doors? Or do you not have them?

If you drop down on a rock or other hard surface with the bottom trim without rook sliders or Rock Rails...Same thing but know as rock sliders, your in for some damage. To me that's the difference between going off road and not going off road for me.

This is just an example of the original design...
https://parts.chevypartspros.com/par...gaAg4mEALw_wcB

here's eBay...

https://www.ebay.com/sch/i.html?_nkw...5%29&_osacat=0

Or some of the gents here can recommend other aftermarket sliders that will bolt to the stock location of the H2..

Have fun sliding​​​​​​​



 
Old Aug 17, 2025 | 11:28 AM
  #26  
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Originally Posted by OVERLANDH2
my H2 is 2004, 200.000 miles on the vehicle,
the last owner meticulously maintained the vehicle at the GMC dealer,
interior looks brand new
body looks brand new, I don’t know how this person drove 200.000 miles without one ding on the body or scratch in the interior.

i changed the belt yesterday
someone added external PS cooler already.
They came from the factory with a small power steering cooler, it's on the front of the radiator, upper driver side. For what you have in mind, I would probably go with a larger one than OEM. There's plenty of room there to do so.

Sounds like yours was a garage Queen like mine.... Although I'm at just over 100,000 miles on a 2003 model.

The factory exhaust usually exits right behind the passenger rear tire.... Tucked in so it doesn't interfere with the rear approach angle. It is common on aftermarket exhausts for people that don't go off-road, to have the pipes exit out the rear. In your case you want to stick to the OEM setup clearly.

The one weak point I would be the most concerned about is the heater hose quick connect at the firewall. You're pretty much past the life expectancy of the OEM plastic connectors, which get brittle with age and simply snap off, empty now your entire cooling system rather quickly. I completely eliminated the factory quick connects.... You can remove them and simply slide 3/4-in silicon heater hose over the heater core nipples at the firewall with standard clamps. Proven reliable for decades. The only other thing you need in that scenario is for one hose, a 3/4 inch to 5/8 in straight adapter to match the size coming out of the water pump on that one hose.

The H2 is probably the best equipped vehicle for your purposes, as you know. While the H1 excels even better off road, the creature comforts of the H2 are definitely something to consider.... Definitely a priority for my wife, LOL
 
Old Aug 17, 2025 | 12:57 PM
  #27  
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Originally Posted by Mark R
Hey Overland...you mentioned... but did you reinstall the factory Rock Rails Under the doors? Or do you not have them?

If you drop down on a rock or other hard surface with the bottom trim without rook sliders or Rock Rails...Same thing but know as rock sliders, your in for some damage. To me that's the difference between going off road and not going off road for me.

This is just an example of the original design...
https://parts.chevypartspros.com/par...gaAg4mEALw_wcB

here's eBay...

https://www.ebay.com/sch/i.html?_nkw...5%29&_osacat=0

Or some of the gents here can recommend other aftermarket sliders that will bolt to the stock location of the H2..

Have fun sliding
I took the side steps out but kept the original rock slides on,
We don’t usually do any major rock crawling,
i also have about 25 years of off road experience, damage is unlikely.
the other two vehicles going with us is usually H3 alpha and Land Rover defender,
I a sure H2 is more capable than those two.
they haven’t had any issues so far.
 
Old Aug 17, 2025 | 01:00 PM
  #28  
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Originally Posted by RobertDez
They came from the factory with a small power steering cooler, it's on the front of the radiator, upper driver side. For what you have in mind, I would probably go with a larger one than OEM. There's plenty of room there to do so.

Sounds like yours was a garage Queen like mine.... Although I'm at just over 100,000 miles on a 2003 model.

The factory exhaust usually exits right behind the passenger rear tire.... Tucked in so it doesn't interfere with the rear approach angle. It is common on aftermarket exhausts for people that don't go off-road, to have the pipes exit out the rear. In your case you want to stick to the OEM setup clearly.

The one weak point I would be the most concerned about is the heater hose quick connect at the firewall. You're pretty much past the life expectancy of the OEM plastic connectors, which get brittle with age and simply snap off, empty now your entire cooling system rather quickly. I completely eliminated the factory quick connects.... You can remove them and simply slide 3/4-in silicon heater hose over the heater core nipples at the firewall with standard clamps. Proven reliable for decades. The only other thing you need in that scenario is for one hose, a 3/4 inch to 5/8 in straight adapter to match the size coming out of the water pump on that one hose.

The H2 is probably the best equipped vehicle for your purposes, as you know. While the H1 excels even better off road, the creature comforts of the H2 are definitely something to consider.... Definitely a priority for my wife, LOL
haha that’s the exact reason why we get an H2
H1 will beat you up doing 600 mile trip, we don’t need its capabilities,
we want capable and comfortable balance.


ok I am gonna check all those connectors.

thank you
 
Old Aug 17, 2025 | 01:01 PM
  #29  
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I’ll be honest
my girlfriend and I are in love with the H2

we have decided that we gonna find one very low mileage H2 and buy it after we gather more experience with this vehicle.

 
Old Aug 17, 2025 | 03:35 PM
  #30  
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i also have about 25 years of off road experience, damage is unlikely.
Well that's good to here then you know the name of the game. But choose your words carefully....."damage is unlikely"......L.O.L

I have been offroading also for many years and seen damage that could of happened but saved by the rock sliders on Pizza Rock at Rausch Creek Offroad Park.. Those of you who have been there will know PIZZA ROCK...L.O.L. At this point I have chosen not to any more as that can become a money pit and trash the H2 which I plane to keep. Now all my fun and money goes into my 65 Corvette BB502 5 Speed with MSD EFI. Lots of fun and I don't have to swap tires when I take it out...L.O.L.

Sounds like your good to go..

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