2023 Tahoe High Country Duramax (earlier thread) died after multiple warnings rotating through display. In shop for 3 weeks (local dealer was great), back and forth diagnosing w/GM, ultimately replaced electronic brake control module. Truck ran fine for 2 weeks, check engine light came on a couple of times, then front collision not available, then tonight full roster on warning messages, turn signals stopped working, got truck home and parked and now won’t start. Strike 2??
Dead again…
- Thread starter dc968
- Start date
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StephenPT
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My gut tells me you have wire harness chafing and/or pin fitment/crimp issues. Tough problems to track down, but GM does have a TSB that highlights some of the common pinch/chaff points on all their engines, including the Duramax. I’ll dig it up and post it soon.
StephenPT
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UsualSuspect
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I must be really behind the times. I would think a brake control module takes care of the brakes, but I guess not. I hope they find the issue, maybe a bad battery? For some reason dead batteries tend to bring out the worst in electronics these days.
Tiredmechanic23
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It used to be that way but modern cars have everything on CAN networks talking to each other and if a module fails it can potential drag down every other module with it until it is replaced. It can make for fun diag work. I work in heavy equipment and its the same way in that field now as well and while its not an all the time thing to see happen it still happens enough to get annoying.
DuraYuk
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Check battery voltage while running. Wonder if alternator is failing.
Update: service rep called today and said they replaced battery and everything is functioning as should. Tech drove home last night and back again this am w/no issues. They’re keeping it for the weekend and will retest everything on Monday.
One question is that they claim to have tested battery the first time the rig crapped out and it wasn’t a problem. This time, same issues but now it’s the battery??
One question is that they claim to have tested battery the first time the rig crapped out and it wasn’t a problem. This time, same issues but now it’s the battery??
CMoore711
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DuraYuk
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Sounds good. If I took your car home I'd have my voltage meter attached to battery and pasted to windshield so that I can definitively say that alternator isn't dropping out.
Sometimes the voltage regulator starts to fail randomly and you won't know unless you see it since checking it may show 14+volts but dropping down intermittently.
Then again I think I had 3 comebacks in 10+years so what do I know.
Good luck man.
Stbentoak
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If something is going wonky and throwing a lot of light/codes and everything else was working fine, the battery is always a good place to start. Load test it and know quickly and correctly that this is or is not a 1st issue. All vehicles today are highly susceptible to low voltage issues and battery is where to start...
Seamus
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The modern cars go nuts with a weak battery. Have experienced this myself twice. A loose battery to starter connection is another common issue. Then grounds being loose and arching. Bottom line a battery or loose connection on any battery wire or ground will wreak havoc. All an easy fix if they look instead of reading codes.
Samson518
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Also, they send telemetry overnight, typically around times when temps are low, especially here in the mid Atlantic. These batteries may be sized relatively small for all the electronics and size of motor (6.2). I put ours on a tender about once every 4 to 6 weeks for several hours. When ours drop voltage, the retract steering column starts to make a clicking sound. Easiest way to detect low voltage issue coming on. Goes on battery tender for several hours. (We have a new battery from the dealer as of a few months ago.)
Well it died again today, this time fortunately in front of my house. Same **** - no crank but a series of error messages scrolling across the center on the dash screen. This is the third time. are they going to fight me on replacing?
SC2CO_TAHOE
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Hi. I have different diagnostic issues with my 22 Tahoe but I’ve only just finished my second service call (bear in mind the two service calls too my Tahoe out of service for 3 months!). Try opening a case with BBB National Auto Program (https://bbbprograms.org/programs/all-programs/bbb-autoline). I opened a case a received a call from GM before I even uploaded all of my documentation to BBB. GM wanted to know how I would like to resolve my issue. They are calling me back on Monday and I will post an update under my other thread.
The speed of GMs call leads me to believe that they know there is a problem with some of these Tahoes and are trying to control the issue . . . Let’s see what they say on the callback though. Good luck,
The speed of GMs call leads me to believe that they know there is a problem with some of these Tahoes and are trying to control the issue . . . Let’s see what they say on the callback though. Good luck,
mckdeezle
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I was hoping you could advise how and what you provided to GM for a case. This is all new to me but I wasn't expecting a new vehicle to havr so many check engine lights (on # 3 so far). My warranty will be expiring soon, too. If it's easiest to email, I can shoot you a message! I just want to make sure I have everything properly document in case I have something legitimate with my Tahoe. I appreciate your time/help!
SC2CO_TAHOE
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Sure thing and glad to help -
I took photos of the dashboard when the diagnostic messages came up, I took screen shots of the automated messgaes from GM that warend of urgent diagnostic issues. I provided them with a copy of the Technical Service Bulletin (that was shared on this forum) that was supposed to recitify the issue but it did not. Invoices from the dealer showing the amount of time it was in the shop and copies of every email and chat message with GM regarding the issue.
Like I suggested in one of my other posts - open a case with BBB Auto Line (https://bbbprograms.org/programs/all-programs/bbb-autoline) it sure seems to get teh attention of GM!
It's great having my Tahoe back but I'm lacking confidence in it and worried that it will act up again at some inopportune time. I think that feeling will pass with time.
I'm also concerned that the amount of time it spend in the shop will be a red flag on a CarFax (or other) report if I decide to sell it.
Please let me know if you need anything else,
