2024 2500HD LTZ L8T Electrical Issues

TXGM White · April 4

Traded my 1/2 Ton 2020 RST 3.0L Z71 Crewcab plus $$$$$ for a brand new 2024 2500HD LTZ L8T Z71 Crewcab on Feb 02. At approx 1600 miles my 1st “no start” encounter with completely darkened screens and only a “clicking” starter relay on this new gem was experienced. Battery is/was a-okay per tow truck driver and my servicing GM dealership on truck and key fob. Steering wheel locked and would not turn/disengage creating more difficulty for tow. After 18 days correcting 80+ thrown computer codes (I was told) and multiple ground checks and torque checks for electrical connections and dealer coordination with high level GM tech “experts”, I was notified that my truck was ready to be picked up. I towed equipment trailer 3-4 times immediately prior to next occurrence with no issues with around 6000LB trailer + load weight. At approx 2200 miles on truck and while finishing complete hookup to my RV trailer for 1st time to get RV inspected this year, it happened again. “No Start” with screen displays visible this time (and radio actually worked this time for “soothing” music) but the steering wheel was again locked with the same starter relay “clicking” and TPMS, Theft Deterrent, and etc Systems in need of service. Yes, my 2024 Summit white 2500HD went down the lane on a flatbed tow truck again singing "..I'm leavin on a flatbed don't know when I'll be back again...". Still awaiting dealer’s “real” troubleshooting input.

Very happy I still have my 2007 GM HD diesel truck that has never experienced anything even close to the 2024 model’s issues…of course it only has analog gauges (which I definitely miss on the new truck not a computer/digital fan).

Any input or experience that might help my dealer resolution with similar issues experienced on your new 2024 year 2500HD full digital/electronic screens with one or more “no start” issues would be appreciated…not sure I can trust this new truck for our future planned 2K-3K distance towing.

64BAwagon · April 4

1 hour ago, TXGM White said:

Traded my 1/2 Ton 2020 RST 3.0L Z71 Crewcab plus $$$$$ for a brand new 2024 2500HD LTZ L8T Z71 Crewcab on Feb 02. At approx 1600 miles my 1st “no start” encounter with completely darkened screens and only a “clicking” starter relay on this new gem was experienced. Battery is/was a-okay per tow truck driver and my servicing GM dealership on truck and key fob. Steering wheel locked and would not turn/disengage creating more difficulty for tow. After 18 days correcting 80+ thrown computer codes (I was told) and multiple ground checks and torque checks for electrical connections and dealer coordination with high level GM tech “experts”, I was notified that my truck was ready to be picked up. I towed equipment trailer 3-4 times immediately prior to next occurrence with no issues with around 6000LB trailer + load weight. At approx 2200 miles on truck and while finishing complete hookup to my RV trailer for 1st time to get RV inspected this year, it happened again. “No Start” with screen displays visible this time (and radio actually worked this time for “soothing” music) but the steering wheel was again locked with the same starter relay “clicking” and TPMS, Theft Deterrent, and etc Systems in need of service. Yes, my 2024 Summit white 2500HD went down the lane on a flatbed tow truck again singing "..I'm leavin on a flatbed don't know when I'll be back again...". Still awaiting dealer’s “real” troubleshooting input.

Very happy I still have my 2007 GM HD diesel truck that has never experienced anything even close to the 2024 model’s issues…of course it only has analog gauges (which I definitely miss on the new truck not a computer/digital fan).

Any input or experience that might help my dealer resolution with similar issues experienced on your new 2024 year 2500HD full digital/electronic screens with one or more “no start” issues would be appreciated…not sure I can trust this new truck for our future planned 2K-3K distance towing.

First thing I would do is contact the service manager (and only the service MANAGER) and ask for a case escalation and to get GM involved. I dont know how the lemon laws work in TX but you may want to research that before contacting the service manager so you know what the process looks like. I wouldnt say it casually but just keep that info in your back pocket in case things start to go sideway.

Assuming the dealer has been following the directions of the people at GM technical (not always a certainty) they will need to involve them again.

The issue of having a large number of codes stored is typical of a failure in the system. That in and of itself doesnt indicate anything catastrophic. If they have already made the connection test etc on it they may want to start swapping out modules.

My opinion when these things have occurred is to be polite but forceful. If something doesnt sound right, say so, I have played similar situations both ways over the years and I can say without hesitation that yelling and name calling will shut down the people trying to help. Not saying you would do that, just offering some insight.

Is this a Flint or Oshawa truck

Scott

TXGM White · April 5

Thx for reply!
Oshawa truck (Canada eh) per placards. My buddy has the GMC equivalent (SLT) made in Flint and no problems except for lack of front end grease, low rear end fluid and the leaking driveshaft at output from tranny (since fixed). Looked at his before I pulled trigger on this Chevy. Hopefully those Canadians actually know what they’re doing!! OR, should I ask if there are known Quality issues out of the Oshawa plant?

With regards to lemon laws in TX, I am aware of the requirements/rules in this state. Previously escalated on 1st go around to the “Chevrolet Executive Resolution Liaison” person. I called and informed this person on this 2nd incident for awareness as truck was going down the lane on the flatbed. Truck bought 57 miles away at another dealer due to unable to buy one/order one through servicing dealership only 15 miles away (I was told GM only “allocated vehicles” to the local servicing dealer). I definitively want to know for certain what the problem actually is as I like the truck with the “Allison” tranny and its seemingly excellent towing abilities when it is running. Nothing definitive was reported as being found on 1st go around with what sounds like only grounds/terminations being checked and verified…GM expertise beyond local techs were supposedly involved in the decision making/troubleshooting process. Will hopefully update with a final resolution soon!

Another JR · April 5

In prior years, some of the 2020+ year HD trucks had similar symptoms due to one or more loose main connections between the battery negative and the truck body due to failure to torque them at the factory. This is something you could inspect for yourself.

64BAwagon · April 5

Something as simple as a poorly seated pin in a connector can wreak havoc on the electrical system. As the trucks get more complex and electronics become a bigger part of the truck its inevitable.

Sounds to me like youre doing everything that you can do, now its just a waiting game.

Pryme · April 5

The 24’s seem like a first year truck to me we see a lot of issues so far. They kind of are though with new transmission, all screens for gauges and whole new ecu “brain” architecture right? Hopefully this gets sorted once and for all.

Edited April 5 by Pryme