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Silverado & Fullsize Pick-ups The Silverado has been one of the best selling trucks in the US for decades, and is truly proven to be "like a rock".

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  #1  
Old 04-19-2008, 07:44 PM
 
Join Date: Apr 2008
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Default Bank 1, Bank 2, whats what?

So its looks like i'm going to be replacing one of my cats. my ses light says my bank 2 o2 sensors reading too lean and my bank 2 cat isnt ruunning effciently. i'm assuming this is the bad cat. (i think thats a pretty safe assumtion) so what side is bank 2?
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  #2  
Old 04-19-2008, 09:20 PM
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Default RE: Bank 1, Bank 2, whats what?

Not sure but I would try replacing the O2 on your cat first and see what happens.
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Old 04-19-2008, 10:22 PM
 
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Default RE: Bank 1, Bank 2, whats what?

Bank one is the driver's side. Bank 2 is the passenger's side. Sensor one in each bank is before the cat. Sensor two is behind it.
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Old 04-19-2008, 10:52 PM
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Default RE: Bank 1, Bank 2, whats what?

As ehhget said, a bad O2 can fool the computer into thikning the cat is bad, try the sensor first then do that cat if the problem persists
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Old 04-20-2008, 09:15 AM
 
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Default RE: Bank 1, Bank 2, whats what?

Don't just throw parts at it.Parts like cats and O2 sensorsare expensive. A dealer (or other mechanic) with a scantool can check your O2 sensors to accurately diagnose the problem.

If you do need to buy cats, you can find them on eBay for about $52 each with free shipping.
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  #6  
Old 04-20-2008, 11:01 PM
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Default RE: Bank 1, Bank 2, whats what?

Yeah like Ron said probably best to have it diagnosed first instead of doing a crap shoot will save some cash and frustration in the long run.
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  #7  
Old 04-21-2008, 07:40 AM
 
Join Date: Apr 2008
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Default RE: Bank 1, Bank 2, whats what?

thanks for the good info all. i believe that my cat is bad because of the loud buzzing noise coming from my exhaust when i'm on the gas. it sounds like a baffold broke lose and is buzzing back and forth or somthing. is that possible??
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Old 04-21-2008, 02:05 PM
 
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Default RE: Bank 1, Bank 2, whats what?

That buzzing noise could possibly be coming from the muffler too, or are you positive it is the cat?
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Old 04-21-2008, 03:23 PM
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Default RE: Bank 1, Bank 2, whats what?

Give the cat a smack with your fist, if it rattles then the insides are shot
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Old 04-21-2008, 11:02 PM
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Default RE: Bank 1, Bank 2, whats what?

Be careful with the smack test on the cat though. I did that once and thought it was bad only to learn it was a bunch of tiny rocks vibrating on the heat shield.
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Old 04-21-2008, 11:02 PM
 
 
 
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