Silverado Y pipe on escalade?

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Discodisco

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Im in the process of bringing my new to me escalade back to life, Ive pretty much sorted everything mechanically except for a p0420 I keep getting. Im in CA and thanks to the CARB a replacement cat is astronomically expensive, I found someone on marketplace with a y pipe out of a 2007 Silverado for 300$. Would the Silverado pipe fit the escalade? Ive pulled up some pictures out of parts catalogs and they look 99% identical.
 
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B-train

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I think the 6.2L has a larger diameter pipe than the 5.3L. If it's the same part number, then you're good to go. Other than potential diameter differences, the mount up should be almost identical
 
petethepug

petethepug

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Ask the seller to wrap a tape around the exhaust pipe. Take that number and divide by 3.14.

After moving the decimal around you should get 2.75 or 3.0”.

Between 07 & 09 on the Denali & Esky they changed the design of the Y pipe 3x. Since you’re potentially swapping 07 to 07 you should be golden.

The only thing you’d probably want to ensure is you’re not getting one off a 4.3L or 4.8L. The 5.3L or 6.0L will probably be a match.

I feel your pain. I may need new CA cats too. Occasionally, it’s not the cats, it’s a bad ground…
IMG_2449.jpeg
 
992dr

992dr

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Discodisco said:
Im in the process of bringing my new to me escalade back to life, Ive pretty much sorted everything mechanically except for a p0420 I keep getting. Im in CA and thanks to the CARB a replacement cat is astronomically expensive, I found someone on marketplace with a y pipe out of a 2007 Silverado for 300$. Would the Silverado pipe fit the escalade? Ive pulled up some pictures out of parts catalogs and they look 99% identical.
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I'd want to be sure you're not buying one with a bad cat to begin with.
I recently saw a 09 Silverado Y-pipe and it looked exactly like my 07. When I was searching (the ole Google) for info, I was getting so much conflicting info I just gave up. Fortunately, I found a 09 Caddy y pipe that I'll be using.

Thanks for the info @petethepug
 
petethepug

petethepug

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Somewhere in the forum a member posted three pics of the 07, 08 & 09 downpipe & cat assemblies off the 6.2L. Still can’t find it.
 
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