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2009 Chevy silverado 2500hd 6.0l 4x4
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4 Posts
Discussion Starter · #1 ·
I have a 2009 2500HD 6.0. It is running rich in both banks. It is non flex fuel with black gas cap. I have owned it since December so about 10 months and codes will not go away. Only 2 codes I have. It runs good and idles ok just uses a lot of fuel. Plugs are slightly black. I have changed knock sensors 02 sensors and maf sensor with no change. What else can I do?
 

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2009 Chevy silverado 2500hd 6.0l 4x4
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4 Posts
Discussion Starter · #4 ·
I have not yet checked fuel pressure. Do you know what normal psi should be? It did have a exhaust leak on the passenger side where the 3 bolts are. I got a new gasket and changed it out about 2 months ago. Didnt seem to change anything. I don't hear any more exhaust leaks. I was thinking about pulling the intake and changing the 2 intake gaskets.
 

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2004 Sierra 3500 6.0L, auto, extended cab, cab&chassis, upgraded to 4wd
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2,182 Posts
When I googled for it, a '10 had the post on the square tube on the passenger side, right next to the crossover pipe. But from your pic, it's clearly not there on yours. I would look under that black plastic cover, but if it's not there, IDK.
 

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04 Silverado LS 5.3
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74 Posts
Well. Somewhere on that line from the tank, there should be something to tie into...or not. Now I'm curious as to where the regulator is, because I still think that's the problem. Have you considered a 2 pound hammer and just love tapping everything in sight?
 

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2009 Chevy silverado 2500hd 6.0l 4x4
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4 Posts
Discussion Starter · #13 ·
Done some googling and looks like 2007 and up you need an adapter to check fuel pressure. Not sure if that's for the 1/2 tons are just the 3/4 tons. Part number is CH-37287-1A



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