2016: Blown CP4, 39000 mi - 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.

 17Likes
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 32 (permalink) Old 05-08-2018, 10:49 AM Thread Starter
DuramaxForum n00b
 
Join Date: Aug 2016
Location: Moreauville LA
Posts: 15
2016: Blown CP4, 39000 mi

Nothing special here, Stock truck, good filters and fuel.

At dealer for full repair and replace, under warranty

This is not necessary. Did this on a Powerstroke 6.7 and traded to duramax as a result. Now this.
beanfarmer is offline  
Sponsored Links
Advertisement
 
post #2 of 32 (permalink) Old 05-08-2018, 11:07 AM
DuramaxForum Enthusiast
 
Join Date: Nov 2015
Posts: 2,236
Quote:
Originally Posted by beanfarmer View Post
Nothing special here, Stock truck, good filters and fuel.



At dealer for full repair and replace, under warranty



This is not necessary. Did this on a Powerstroke 6.7 and traded to duramax as a result. Now this.

The Powerstroke and Lml use the same pump. Iíd look for new fuel station seems like quite the coincidence youíve had 2 cp4s grenade. Id bet itís bad fuel.

FYI the L5P has a different fuel system.


Sent from my iPhone using Tapatalk
Sierraluva likes this.
LML6600DMAX is online now  
post #3 of 32 (permalink) Old 05-08-2018, 11:16 AM
Duramax Forum Supporter
 
Sierraluva's Avatar
 
Join Date: Dec 2016
Location: Georgia
Posts: 1,649
Garage
What did the dealer say about the fuel? Did they have it tested? If not I would personally have it tested so I knew.



EFILive by RidgeRunner. 🤘 Fuel system support hardware, CCM front Diff Drop, some LEDs to make night into day, got some big ol 20's and wide ass tires and a nice display to show me what's up under the hood-

2012GMC2500CCSB
Sierraluva is offline  
Sponsored Links
Advertisement
 
post #4 of 32 (permalink) Old 05-08-2018, 11:45 AM
Senior Member
 
ctdmax's Avatar
 
Join Date: Oct 2011
Location: Connecticut
Posts: 280
What were your symptoms? Started my 2016 LML today, let it warm up fo 3 minutes put it in reverse and it started shaking and check engine light came on, called OnStar and they told me it was code p2146 and that there was a problem with the fuel management system..currently at the dealer to find out what is wrong..Only has 20000 miles it.

2016 GMC Sierra Denali Duramax, White CC 4x4 With Boss Plow.
ctdmax is online now  
post #5 of 32 (permalink) Old 05-08-2018, 11:53 AM
DuramaxForum Enthusiast
 
Join Date: Nov 2015
Posts: 2,236
Quote:
Originally Posted by ctdmax View Post
What were your symptoms? Started my 2016 LML today, let it warm up fo 3 minutes put it in reverse and it started shaking and check engine light came on, called OnStar and they told me it was code p2146 and that there was a problem with the fuel management system..currently at the dealer to find out what is wrong..Only has 20000 miles it.


Cp4 failures usually happen suddenly and the truck just quits running and wonít restart.


Sent from my iPhone using Tapatalk
LML6600DMAX is online now  
post #6 of 32 (permalink) Old 05-08-2018, 01:00 PM
Senior Member
 
ctdmax's Avatar
 
Join Date: Oct 2011
Location: Connecticut
Posts: 280
Quote:
Originally Posted by LML6600DMAX View Post
Cp4 failures usually happen suddenly and the truck just quits running and won’t restart.


Sent from my iPhone using Tapatalk
Thanks..it’s starts up fine but runs really rough and as I said there is a non blinking engine light. Had it flatbed to the dealership. If by chance it is the cp4 than it will be traded in on a L5P..Hoping for the best.
Sierraluva likes this.

2016 GMC Sierra Denali Duramax, White CC 4x4 With Boss Plow.

Last edited by ctdmax; 05-08-2018 at 01:02 PM.
ctdmax is online now  
post #7 of 32 (permalink) Old 05-08-2018, 02:09 PM
Senior Member
 
shortnugly's Avatar
 
Join Date: Jan 2010
Posts: 260
Dammit!! I did not need to see this post.
rblack222 likes this.

2015 Denali HD
Airdog II 165 Lift Pump
RC Leveling Kit
Toyo Open Country AT II
Exergy FCA / MPROP
Edge CTS2
Fragile CP4
shortnugly is offline  
post #8 of 32 (permalink) Old 05-08-2018, 04:26 PM
Duramax Lifetime Supporter
 
CDmax16's Avatar
 
Join Date: Feb 2017
Location: Spanish Springs NV
Posts: 511
Quote:
Originally Posted by shortnugly View Post
Dammit!! I did not need to see this post.
Quit looking at these threads until we tune,cp3 and put twins on your truck.
Sierraluva likes this.

2016 2500hd Custom Sport, Z71, LTZ
Leveled with Moto 961's and 295/70\18 Ridge Grapplers,Amp steps, Weathertech mats, Extang Encore,S&B dry,
Wehrli intake bridge and AFE IC piping,Edge Insight cts2, AirDog II 165,SDP resonator delete, Mishimoto pcv catch can,Motorops TCM+ tuning, MBRP down pipe,Recon led tail lights and third brake light, Morimoto mini D2S 5.0 projectors w/hidís, Morimoto 2stroke 2.0 ledís highs and fogs.
Kryptonite ucaís & tie rod sleeves, CCM diff drop,Fox 2.0 reservoirs, steering stabilizer, CalTracs,
Cognito PISK and heavy duty sway bar links, AirLift bags...
CDmax16 is offline  
post #9 of 32 (permalink) Old 05-08-2018, 04:51 PM
DuramaxForum Enthusiast
 
Join Date: Nov 2015
Posts: 2,236
Quote:
Originally Posted by CDmax16 View Post
Quit looking at these threads until we tune,cp3 and put twins on your truck.


Then you can look at the cracked piston and broken crank threads lol


Sent from my iPhone using Tapatalk
wade_660, Black HD and Sierraluva like this.
LML6600DMAX is online now  
post #10 of 32 (permalink) Old 05-08-2018, 05:03 PM
Duramax Lifetime Supporter
 
Black HD's Avatar
 
Join Date: Dec 2015
Location: WPB, FL
Posts: 1,221
@LML6600DMAX Your words are very hurtful. Lol.
LML6600DMAX likes this.


2005 Toyota Tacoma DC 4x4 4.0L TRD Off-Road
2008 Yamaha Zuma YW 50

2015 GMC 2500 Denali HD 4x4 Duramax/Allison Black on Black
2016 Grand Design Momentum M-Class 350M Toy Hauler
Black HD is online now  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Chevy and GMC Duramax Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome