Hummer H3 For 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.

PO 0017 code with a PO 0300 to boot. Runs rough...

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Old Sep 18, 2025 | 04:21 PM
  #31  
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So the saga continues. Tried to take this exhaust down laying on my back in the garage. Those nuts wont bust for me ...

Taking it down to big CJ for his crew to do it up.

CJ told me there are 2 cats to choose from one is cheap and other expensive. CJ said dont go cheap get the good one...

Any clues on what this operation may venture for the fix?
 
Old Sep 18, 2025 | 05:47 PM
  #32  
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A catalytic converter is covered by a mandatory federal emissions warranty for 8 years or 80,000 miles (whichever comes first).
 
Old Sep 18, 2025 | 05:59 PM
  #33  
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Front or Rear? Prices dropping as time goes by!

2006 hummer h3 catalytic convertor 2006 hummer h3 catalytic convertor
 
Old Sep 19, 2025 | 03:57 AM
  #34  
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Originally Posted by hummerz
Front or Rear? Prices dropping as time goes by!

2006 hummer h3 catalytic convertor
Thanks hummertz ^^^ Its the rear. Got a header on that took away the front Cat,,, @ $212,oo that looks like a deal...
 
Old Sep 19, 2025 | 10:03 AM
  #35  
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Take a look ........
2006 H3 Hummer Cats
 
Old Sep 19, 2025 | 04:22 PM
  #36  
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Wow Woody this is turned out to be a bumpy ride.
 
Old Sep 20, 2025 | 03:19 AM
  #37  
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Originally Posted by Happy Hummer
Wow Woody this is turned out to be a bumpy ride.
^^^When I took the H3 down to my mechanic. Explaining some of this took a moment or two...

He laughed when I asked what I wanted him to do.
 
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