Best way to verify CP3 installed - Chevy and GMC Duramax Diesel Forum
11-16 LML Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

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post #1 of 11 (permalink) Old 08-20-2019, 08:50 AM Thread Starter
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Best way to verify CP3 installed

I'm wondering what the best way to verify if a CP3 pump was installed on an LML. Is there a tell tale sign visually?

Truck is a 2015 Denali.

Thanks

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post #2 of 11 (permalink) Old 08-20-2019, 09:20 AM
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There should be obvious signs like turbo piping changed, intake piping. Also there would have to be a tune installed. Those are the most obvious, other then looking at the unit itself. Can you get a pic of the unit?

What makes you question this?

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post #3 of 11 (permalink) Old 08-20-2019, 11:08 AM
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I believe the position of the regulator is different, which you should be able to see. I would look at pics of a cp3 and cp4 then verify where the regulator is seated on the truck.

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post #4 of 11 (permalink) Old 08-20-2019, 11:29 AM
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If itís just a standard cp3 swap, youíll have a fuel temp sensor thatís not threaded in anywhere but plugged into the harness. In the area of the driver side fuel rail


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post #5 of 11 (permalink) Old 08-20-2019, 12:15 PM
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Quote:
Originally Posted by 6686L View Post
Good idea - that way you wonít be posting incorrect info, and well- meaning questioners wonít be mislead.

Actually, the info I posted is correct. Hard to mislead anyone with not a lot of info to go on. I simply gave the info that I know from the experiences I've seen and from my install.

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post #6 of 11 (permalink) Old 08-20-2019, 01:27 PM
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Quote:
Originally Posted by J83 View Post
Don't mind that guy, hes new, a troll, and super salty. Hes already on multiple peoples ignore list and I'm sure hell burn himself out once people get tired of reacting to his drivel. It does not matter how right you are, how much evidence you produce to defend your opinion or how logical your argument is, he will still only read 20% of what you said, miss quote you and twist your words to get a fight out of you. The rest of us reasonable people appreciate those users who try to offer helpful and polite answers to other users questions.
Well stated.
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post #7 of 11 (permalink) Old 08-20-2019, 07:34 PM
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Jesus...here we go again...the "expert" has returned...

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Did someone ask for an expert
Quote:
Originally Posted by Ineedabiggertrailer16 View Post
“Now thats” the “pot” calling the “kettle” “black”

Just because you did your swap your way doesn’t make it the ONLY way. More than one way to skin a hippo
I skin hippos from the dick up. Only way to keep the Cape in good shape.
OP, read what matt said, also theres one return line instead or two. There should be a cap in the passenger side rail that you can visually see from under the filter head.
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Last edited by SilverGorillaLML; 08-20-2019 at 08:58 PM.
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post #8 of 11 (permalink) Old 08-20-2019, 07:47 PM
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Name:  IMG_4592.jpg
Views: 204
Size:  26.7 KBName:  IMG_4591.jpg
Views: 205
Size:  33.6 KB

Rail cap on passenger side rail courtesy of @SilverGorillaLML


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post #9 of 11 (permalink) Old 08-20-2019, 07:51 PM
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Attachment 1043567Attachment 1043565

Rail cap on passenger side rail courtesy of @SilverGorillaLML


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Thanks cody.
OP That's an sure way to tell and is fairly easy.

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2012 qcsb 6.8L cummins, Big single, Big fuel, 48re swapped,
2011 GMC Sierra 2500 CCSB LML,
BIG s400, fuel, supporting mods
THANKS TO, SDP, WCFAB, LDS, DHD, FREEDOM RACING ENGINES, GDP, EXERGY, S&S, ATS, FLEECE, DEALER FOR UNLEASHED TUNING.
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post #10 of 11 (permalink) Old 08-20-2019, 08:05 PM
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Originally Posted by SilverGorillaLML View Post
Did some ask for an expert





I skin hippos from the dick up. Only way to keep the Cape in good shape.

OP, read what matt said, also theres one return line instead or two. There should be a cap in the passenger side rail that you can visually see from under the filter head.
Great info...thank you, sir!

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