which one is my catalytic converter

2006 HUMMER H3
5 CYL • 4WD • AUTOMATIC
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CHUYARM
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  • 5 POSTS
i need my catalytic converter replaced but they show two converters 1 is a manifold and 2nd one is a rear converter which one is the right one
Aug 19, 2011 at 6:45 PM
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SATURNTECH9
  • ✓Experienced Mechanic
  • 30,869 POSTS
What are you trying to ask?The one on the manifold is your pre or pup cat.Which one is bad?
Aug 19, 2011 at 6:47 PM
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CHUYARM
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  • 5 POSTS
gm dealer scanned car and got p0420 code catalyst low efficiency bank 1 recommended converter replacement so i dont really know which one to replace
Aug 19, 2011 at 7:06 PM
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SATURNTECH9
  • ✓Experienced Mechanic
  • 30,869 POSTS
That would be the rear cat not the manifold one.
Aug 19, 2011 at 7:15 PM
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CHUYARM
  • MEMBER
  • 5 POSTS
thank you for your help
Aug 19, 2011 at 7:28 PM
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SATURNTECH9
  • ✓Experienced Mechanic
  • 30,869 POSTS
Your welcome thats what were here for.
Aug 19, 2011 at 8:35 PM
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