Jump to content
  • Sign up for FREE! Become a GM-Trucks.com Member Today!

    In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. From buying research to owner support, join 1.5 MILLION GM Truck Enthusiasts every month who use GM-Trucks.com as a daily part of their ownership experience. 

Recommended Posts

F me... just joined this club.

 

2020 3.0 totally dead.  3 hours on a charger, not even a light.  Tow guy had the industrial jumper.  Got it in N and hauled it off.

 

can’t wait to hear the BS from service advisor..

Link to post
Share on other sites
  • Replies 71
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Popular Posts

Thanks for the fix!  Tripped both P0700 and U0100 today and found this.  Those 4 bolts were only at about 15 inch-pounds, and the green indicators were up.  Talked to my service rep at the dealer to c

Lol! Thanks. Must admit this is my first gm product and it takes the prize for spending some time in service so soon. Got my truck back! They put a new battery and cleared codes. Plus they took care o

Well she'll not be too troublesome from here on out.  Chances are, she sat for quite a bit after being built and the battery went bad. 

#PIT5742A: SES MIL / No Start / No Crank / Runs Rough / Reduced Engine Power / Loss Communication / DTCs (V8 and V6 Inspect Engine Harness) - (Jul 29, 2020)
Subject:  SES MIL / No Start / No Crank / Runs Rough / Reduced Engine Power / Loss Communication / DTCs (V8 and V6 Inspect Engine Harness)

 

999999995.gif

Brand:

Model:

Model Year:

VIN:

Engine:

Transmission:

from

to

from

to

Chevrolet

Silverado 1500 (New Model)

2019

All

All

LV3, L82, L84, L87

All

Chevrolet

Silverado 1500

2020

SOP

Built Before 2/14/2020

LV3, L82, L84, L87

All

GMC

Sierra 1500 (New Model)

2019

All

All

LV3, L82, L84, L87

All

GMC

Sierra 1500

2020

SOP

Built Before 2/14/2020

LV3, L82, L84, L87

All

These concerns could be caused by the engine wiring harness chaffing on the ECM mounting bracket, as shown below. The ECM mounting bracket has a sharp edge (1) and it can cut into the wiring harness.  Due to the number of circuits in the harness, there is a wide variety of different symptoms that could occur depending on which circuit(s) are damaged.

 

 

 

  • Like 1
Link to post
Share on other sites
  • 4 weeks later...

2020 GMC Yukon 

Already replaced the battery after 2 months of no problems. I cannot leave it set for more that 4 days without being able to start it. I’ve had to put a battery tender on the “new” battery. 
 

dealer told me that it is just the way it is and nothing they can do about it. I’ve never heard of buying a new vehicle and having to plug it in so you can use it when you want. What a crock....

 

Anyone else having this problem and find a real solution?

Link to post
Share on other sites
  • 6 months later...

   I've had the same issue now twice. I bought a 2020 AT4 in October. I drove to see my wife in British Columbia (from South Carolina) for a few months this winter/spring). My truck sat for 4-5 days not started (in 30-40 degree weather) and went out one morning to start it- didn't start. Got my jump box out and it started, but took it to the dealership to replace the battery because it didn't start again without the jump box after i drove it around for a bit. The dealer in BC said they think i got a defective battery. OK. I figured since it was cold outside at least that may have contributed to it. 

 

  Fast forward to last week (July 18, 2021). Back in South Carolina. My truck sat again for 4-5 days (80-90 degree weather) without my starting it. Go out to the garage and key fob won't even unlock doors. I have a bakflip tonneau cover on my truck that unlocks from the inside... Go to try to pop my "multi-pro" tailgate to get my jump box or jumper cables- no dice. Fortunately this time I was somewhere I had access to another truck to use to try to jump it. Hooked up jumper cables and boom- every error message there was flashing by. Unfortunately the battery was actually dead.. wouldn't start with another truck jumping it. So i had to get onstar to come tow it to the dealership. They called me a couple days later and said it was a bad battery... I basically told them i didn't think thats what it was- it's happened before. He looked into my records and realized it had happened in March. They kept it for another couple days and said to come and get it, it was a bad connection to the battery terminal. Very nice guys and i certainly don't blame them, but all i did was spend 30 seconds on the computer googling "sierra 2020 dead battery" and it brought me here to tons of examples of the same issue, so it would be difficult to convince me that GMC is trying very hard to figure this out.

 

  I think the multi-pro tailgate is absolute garbage and poorly designed. Not having any way to manually open your tailgate seems idiotic to me at least. I asked the dealer about that and he looked into it and said there was no way to open it with a dead battery... his response was "get a different tonneau cover that locks from the outside". I called GMC north america to ask them- i was informed if my battery goes dead and my cables/jump box are locked in my bed that I cant access it and I need to call roadside assistance and get towed. Well, unfortunately where my wife lives I could be somewhere very cold and remote in the mountains. It's absolutely a safety concern. 

 

 I assume no one has found a real solution to this issue yet. I am going to go through this thread again more carefully- but i wanted to add this story. 

 

 Hope you guys are having a good Monday. Thanks for all the information

 

E

 

 

Link to post
Share on other sites
  • 3 weeks later...

Second dead battery in under a month. I drove my truck yesterday. No problems. Got up this morning to a totally dead battery- too dead for a jump box or cables to another truck to start. Dead. Overnight. Good lucking truck but its a lemon 😪

Link to post
Share on other sites
  • 4 weeks later...

Just had this happen to me. Had an intermittent engline light flicker a few weeks ago. Then Friday I got an ABS/Service ESC codes. Today, got the same codes as well, went to the grocery store. Went to leave and truck wouldnt turn over. Battery was only at 10.5V, truck was built 3/19, so only 30ish months. But the issue really came out of nowhere. I have an appt for Thursday, but will probably drop it off tomorrow if I can get it started. 

Link to post
Share on other sites

I had my 4th dead battery since March last week. Truck is in the shop again. After the third, the Service Advisor at the dealership kind of blamed my winch (Warn Zeon 12) and/or the pedal commander I had hooked up. I did a little research and called both companies. Pedal commander said it was impossible- their product doesn't actually drain any power- it just changes computer settings when it is on (it hadn't been used in months). Warn said it wasn't likely- but they put a power switch on this model. I actually had the power switched off before the 3rd battery died, but when the dealer replaced that battery they disconnected the warn winch anyway- so it couldn't possibly have contributed... Also took the pedal commander out anyway just to be certain. Now the truck is in the shop for the 4th battery- and they are at a loss. They actually admitted this time they think some module is coming on that shouldn't be- and are doing more tests. I hate to say i was glad that it happened again, but after blaming my winch and pedal commander it was somewhat redeeming that those weren't the problems. Anyway- hopefully they figure this issue out. I forwarded this thread on to the dealers service manager so they are definitely at the very least aware that its not an isolated issue. 

 

E

Edited by AT4ChapinSC
Link to post
Share on other sites
  • 2 weeks later...

I had a "no start" similar to a dead battery off and on for the last 2wks so I stopped to chat with my dealer and they checked it out and said my starter is bad and ordered new one.  After reading this info regarding the fuse block I went ahead and tightened all four as they did seem loose.  fingers crossed but I'm now on day 3 with no issues...hard to believe this might be the answer as my dealer orders useless parts.   They didn't seem to be aware of the fuse block TSB. 

Edited by ajs800
Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Similar Content

    • By David Ottenbacher
      Hello, for the past two years my truck (2015 Sierra 1500 All Terrain) has been intermittently flashing service lights saying the to service ABS, to service stabillitrac, and to service parking sensors. This would happen a few times a month and would immediately go away and I would think that it was just an annoying bug. But since about a month ago, when making low speed left turns, as well as any size bump, caused it to happen. This worsens into ABS light and stabillitrac light on for one day. While this happened you could feel the ABS pumping at when braking normally. This too went away the next day. I took the truck to the dealer for a diagnostic and told them all of this as well. After the $190 diagnosis they said it was the following codes (attached photo)
      C0035-04, C0040-04, and C0035-0F. 
      they told me both front hubs were bad and needed replacement. They wanted $1800 for parts and labor. I told them thank you and paid the diagnosis and took the truck home. After the dealer the trucks electronics and 10x worse. Now the ABS and Stabillitrac lights stay on permanently, the brake light dings and flashes with any turn of the steering wheel. Also getting constant service ABS, service trailer brakes, Service stabillitrac, and reduced steering assist. I bought both front hubs and wheel speed sensors. I installed them and torqued everything back to spec. After reconnecting the battery and taking a test drive nothing had changed. I took the top panel from the dash off and did the ground mods. Again, no change. I’m going crazy trying to find the problem. I the. Took the truck to autozone for a code read. It still says the same three codes and it did, even after replacing the parts and sensors the dealer said would work. If anyone knows what the cause is it would be much appreciated. Thanks in advance, Dave

    • By Humberto Alvarez
      I have a 2004 GMC Sierra 4.3 and lately it's been like losing power when I'm driving down the road it acts as if it stalls and I pump the gas pedal and it turns back on or regains power. I have replaced the fuel filter, fuel pump, speed sensor, mass airflow sensor, spark plugs and also cleaned the throttle body. Do y'all  have any idea what could be causing my truck to be acting like that?
    • By Alex Warner
      Hello!
       
      I have taken my truck to a couple shops but no one can seem to find what wrong with it.
       
      When I come to a stop, my truck acts like it wants to stall out. It doesn't happen all the time but it is becoming more frequent. When stopping, the rpms die, all my gauges drop to zero and all my warning lights flash at me and turn back off. I don't have a check engine light on and when my truck is scanned, there are no codes that come up. 
       
      I have been told that it is possibly bad torque converter solenoids but I have a weird feeling that I might have some electrical gremlins somewhere. 
       
      There have been times where I am driving down the road and I go to make sure my windows are rolled up and the gauges due while rolling and my electrics cut out for a second and come back on. 
       
      There was also once where a truck pulled out down the road from me so I applied the brake to give them room and my truck downshifted hard and jumped to 3500 rpm and felt incredibly sluggish to get back on gas and up to speed.
       
      Any help or any direction to a fix is greatly appreciated. Please help me find out what's wrong with my truck! Thank you!
    • By DrBaylor
      I purchased a 2021 Silverado Z71 in April, and I love it, but an odd quirk with the infotainment system. Each time I get in my truck, with the same cell phone I always carry, I cannot make a voice activated call for up to 5 minutes.  The response is always "please wait, I am loading your contacts".  Why does the system load my contacts each time I get it the vehicle?  Is there any way to have it store the contacts and not upload every time?  Is it supposed to do this?
  • Recently Browsing   0 members

    No registered users viewing this page.

  • Forum Statistics

    234,508
    Total Topics
    2,493,795
    Total Posts
  • Member Statistics

    257,501
    Total Members
    8,960
    Most Online
    Travisjackman
    Newest Member
    Travisjackman
    Joined
  • Who's Online   56 Members, 0 Anonymous, 2,937 Guests (See full list)




×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.