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Hummer H3For the Hummer driver who wants the rugged look and off road capabilities of the Hummer, but in a smaller size and with a more fuel economy friendly engine.
What is there to "restore"? H3s are not that old, they made a bazillion I5 06-08s, and a ton of 08 Alphas. If yours is falling apart, sell it and get one in better condition with lower miles.
H3Ts are a little different story.
Anybody that does auto restoration can work on an H3 to replace rusted body parts or perform maintenance.
I have 169,000 miles on a 2009 H3X. Still runs great with the exception of the Hi/Lo 4WD. No longer switches into Hi/Lo. Been that way for 8 years. We don’t go 4wheeling. Looses a quart of oil every 2000 miles. My wife drives it and loves it. I’m trying to convince her on the Hummer EV SUV. Have one reserved. But she’s not all in on EVs. Not sure how to go about fixing up the H3.
You can start with the Transfer Case Shift Fork by replacing the failed plastic fork with the metal replacement. H3s are like a Chevy truck, take it to a reputable local repair facility. If you have no relationship with one, ask family, friends, co-workers if they do.
Not much you can do if it is burning oil, but make sure it is not leaking oil as leaks can be fixed.
Actually, there is a really nice two part video on YouTube that some kind soul made (very descriptive) on how to fix the H3 transfer case problems.
As far as the engine, it may be time for a rebuild or rebuilt swap. Of course that's still cheaper than a new EV. Gas prices are high but that EV costs well above $100K lol.