Jump to content

3.0 Duramax cranks but won’t start

Dbersuch
 Share

Recommended Posts

Barrett10 Enthusiast

Barrett10

Posted
Posted
46 minutes ago, J_Will said:

I have 9000 miles on the truck and the issue has happened about 6 times.  First time was within the first 400 miles.  Last time was about 1 month ago.  Had my 2021 GMC Sierra SLT 3.0 in the shop for about a week.  Dealership had no knowledge of the issue and I supplied the service bulletin # for them.  They dug all the way down to the "bent wheel" issue and visually inspected that it was not bent.  So that was not the issue with my no start long crank problem.  GM told them to put it back together and update the computer and give it back to me.  It's been 1 week post "repair" and has not happened yet.  Since it's intermittent I'm expecting it to happen again, but will probably be a while longer.  I think at this point GM doesn't have a clue.  I've reached out to other youtube people that reviewed these trucks/engines and had talked with the GM engineers in reviews past.  The YouTube influencers are now saying that GM is keeping tight lips on this one!  Just means they don't have a clue and they don't want the YouTube influencers jumping all over this.

Truck is still in the shop, been in the shop 53 days total, over 30 days this time. They have the front end tore off, engine tore out, said the cam reluctor wheel is bent.  I have been trying to get a hold of a manager at GM for days. I have a case and I have spoken to my customer service rep several times.  They have all my information. Trying to get reimbursed for this truck.  The customer service has been very unresponsive.

09FC6614-A99C-4ABD-92BE-B855A0956704.jpeg

652A8AB2-C5A5-4FFE-9D64-9D40E986F9B6.jpeg

  • Replies 510
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Popular Posts

ColoradoCub
ColoradoCub

There’s nothing you did that will avert it happening again, and as of now GM has no clue how to make this problem go away. They are 0 for 3 on bulletins to fix it, and tightening fuse block bolts, hol

Another JR
Another JR

Moderators    Could you please move this thread?  This engine is not used in the HD trucks. Thanks

MyFordsNeverBreak
MyFordsNeverBreak

The confirmed fix is to trade the vehicle in..

Posted Images

Barrett10 Enthusiast

Barrett10

Posted
Posted
Just now, Barrett10 said:

Truck is still in the shop, been in the shop 53 days total, over 30 days this time. They have the front end tore off, engine tore out, said the cam reluctor wheel is bent.  I have been trying to get a hold of a manager at GM for days. I have a case and I have spoken to my customer service rep several times.  They have all my information. Trying to get reimbursed for this truck.  The customer service has been very unresponsive.

09FC6614-A99C-4ABD-92BE-B855A0956704.jpeg

652A8AB2-C5A5-4FFE-9D64-9D40E986F9B6.jpeg

More pictures

BF19B9B6-F760-4C14-9B8C-9EB4C7A0B936.jpeg

28115EE1-3F0B-47F1-8C38-F4944D562139.jpeg

Frankhpns Enthusiast

Frankhpns

Posted
Posted
On 8/13/2021 at 3:20 PM, macodi said:

For those that did the buyback process, how much of the original purchase price did they refund?

Currently in litigation with GM. I requested full refund+rental+time and inconvenience+attorney fees. 

  • Like 1
Barrett10 Enthusiast

Barrett10

Posted
Posted
2 minutes ago, Frankhpns said:

Currently in litigation with GM. I requested full refund+rental+time and inconvenience+attorney fees. 

Frankhpns:   Just sent you a message, please take a look... thanks,

Claxy515 Enthusiast

Claxy515

Posted
Posted

The shim sounds promising. This might not be related, but since grounding has been brought up, mine has an annoying high pitch whine when I'm driving at high speeds. Sounds like it's coming through the speakers. Grounding issues, GM?

DVR Enthusiast

DVR

Posted
Posted

Not speculation nor an opinion, just curious if this issue has affected 3.0 trucks assembled in all of GM's assembly plants. Our truck came out of Fort Wayne in May.

 

moobaru Enthusiast

moobaru

Posted
Posted
23 minutes ago, DVR said:

Not speculation nor an opinion, just curious if this issue has affected 3.0 trucks assembled in all of GM's assembly plants. Our truck came out of Fort Wayne in May.

 

 

My VIN starts with a 3, I believe that indicates Mexico IIRC.  I have the long crank no start, and fuse box bolts way out of spec (not the issue evidently).

Frankhpns Enthusiast

Frankhpns

Posted
Posted

The truck is assembled there, but the engine is from Flynt. Who knows where the engine camshaft sensor reluctor comes from.

 

GJR1212 Enthusiast

GJR1212

Posted
Posted
48 minutes ago, DVR said:

Not speculation nor an opinion, just curious if this issue has affected 3.0 trucks assembled in all of GM's assembly plants. Our truck came out of Fort Wayne in May.

 

My GMC 3.0 was assembled in Mexico.  I suspect the engines are probably assembled in one or two plants and then shipped to the other locations to install them.   Seems like most of the problem trucks like mine were made in March 21.   It is pure speculation, but this is about the time all the car makers were running out of chips for their cars.   I recall from the early days of PC's that, in some cases,  the higher priced fastest version of the chip were identical to the slower clocked, cheaper versions.  They determined which ones to clock at what speed by testing them.    I wonder if GM accepted a batch of marginally performing chips to keep their lines running.  The sporatic nature of most of these failures could just be a misread bit of data that reads correctly the next try.  As computer guys use to say, "just a bit out of place".

Barrett10 Enthusiast

Barrett10

Posted
Posted
44 minutes ago, Frankhpns said:

The 3.0 diesel is built in Flint Michigan.

Talked to the service department yesterday, the new reluctor wheel that came in is bent. They have to order another one… 🤔

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • richard wysong
      Wow I'm in a pickle. (Broke down truck) and a story.

      By richard wysong · Posted

      I had an 88 K1500 with a 5.7 that had those symptoms, I know totally different, it ended up being the ECM. Once you get the fuel system fixed if it still runs lousy you may want to investigate that. it didn't set any codes, stalled ,ran rough at times etc
    • James Beyer
      Trading 7.3 (Godzilla) for G.M.C gas

      By James Beyer · Posted

      Congratulations Isttype, on your gmc. Really like my 2024 2500hd sle doublecab now with 85,500 miles.  I checked the oil today at 4800 miles since last oil change and barely reading on the stick.  I don't care if GM says it's Acceptable adding a quart every 2000 miles because that is 100% BS, It is not a 1966 Harley Shovelhead! Sounds like it's setting up a future failure like I had with my 1500 6.2l. Other than oil consumption problems, I really like the 6.6l gas and 10 speed is really nice.  Towed a light 4000 pound trailer last week and averaged 14 mpg.  I was pretty impressive that a 7300 pound gas truck did 14mpg towing, Later-
    • Grumpy Bear
      OCI, not when but why?

      By Grumpy Bear · Posted

      Long Term Cold Cycle Limited Testing   Back to the 1990's and XOM's million mile test. Since then there have been others and there will be more. Schaeffer's, AMSOIL to name two. Of these Schaeffer's is the stand alone which I will explain in a bit later.    http://papers.sae.org/600190/:   http://papers.sae.org/850215/:   Up to 75% of  engine wear occurs on cold starts. These two links (above) provide the technical reasons for engine wear. In a nut shell, and by a large margin, cylinder wear is what takes out most motors and even with a pre-oiling system that part of the engine is dry enough on cold starts and cold warm up to pierce Stribeck.   So when you put a motor, or a car, on a dyno for a million miles stopping only for oil changes, (yes fuel is uninterrupted) or break down maintenance, you are depriving the test of the most important part of it's wear cycle. Yes a million is then a pretty easy walk even for a mineral oil under those conditions.    How about cleanliness during the long test cycles? Same thing. Varnishes that stick rings and insulate parts are laid down by repetitive 'heat cycles'. It's the cool down the precipitates the varnishes. These long runs also hinder acidic attack caused by cold start richness and less than optimal cold start ring sealing. They hinder water formation and enhance breathing of the crankcase; the petri dish of acid formation, the first step in sludge formation, amalgamation and precipitation. These motors are also monitored and controlled for water and oil temperatures to within the "normal operating range".      https://www.swri.org/sites/default/files/sequence-iiih-test.pdf Note the test sequence in some boutique oils literature for testing, API IIIH, is not the standard used for the ILSAC G7 testing. Does that mean it is irrelevant? No, not as used. As used as a 'visual guide' it makes it's point. The G7 weighted piston deposit minimum is lower.      Back to Schaeffer's. That was a cyclical test of an engine in fleet service and not a dyno mule and if you saw the video it was not mirror clean but wear was low.    There are oils like BioSyn and other 'Renewable" source oils that taught cleanliness and have proven themselves in fleet testing. Havoline an other example.    The newest ILSAC G-7 test prioritize cleanliness, LSPI mitigation and fuel economy OVER WEAR. In comparison Porsche C30 Specification Verses ILSAC G-7 Specification below:      Some will balk that this graph isn't apples to apples and I will challenge that in that this graph represent the SPECIFICATION and not the any One Oil Performance.   It is absolutely possible to minimize wear, maximize cleanliness and mitigate LSPI etc., It just isn't cheap and currently I see none that are not walking toward profit over performance.     
    • asilverblazer
      Intermittent no-code issues on 2022.5+ V8 trucks — what did the shop fail to capture?

      By asilverblazer · Posted

      I don't think you will need a split, separate product, etc., the OBD port should be able to deliver everything you need. Since your device would be plugged into it all the time, it wouldn't miss anything.    Hardware in this case will be the easiest part of your project - ELM 327 devices will already deliver all the data you need. Reporting/software is where your advantage/marketability is.
    • Coastie05
      2027 GMC Sierra: Official Discussion

      By Coastie05 · Posted

      I do too. I’ll never be stuck again 😂

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...