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About BlaineBug

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  1. Curious to see what codes were set when the check engine light illuminated.
  2. Where is QC then? At the very least why aren't they cleaning the location of the grounds to remove wax undercoating contamination?
  3. That ground you found to be full of undercoating is G141. My 2019 Yukon was also found to have an undercoated G141. Although my electrical issues were a lot more sparse. The only present code was loss of communication with the ECM, so GM TSC recommended replacing the ECM as well. But then the technician found this dirty ground. I'm not sure if my issues will be non-existent from here on out but they were certainly different from yours. This could be a more wide-spread problem, but to my knowledge there is absolutely no TSB that addresses G141 as being contaminated with undercoating. The only TSB where G141 is mentioned is the TSB for improperly heat treated bolts used for grounds that can apparently stretch and loosen up a little bit, causing a potential bad ground. And in that particular TSB, there are a host of grounds listed to check. Although G141 being the main one as it is the main connection between battery and frame, which can cause many problems elsewhere. In regards to the G218 ground you checked up on the dash, as you found, your truck should have been unaffected. According to the TSB for that issue it affected trucks and SUVs built prior to June of 2015, so that would include all 2014 models and some early 2015 models.
  4. I wouldn't trust it. The first time my Yukon was in, they claimed to have performed TSB 18-NA-161. But then when it went in again they found ground G141 to be full of undercoating. If they truthfully performed the TSB to its fullest extent, I would have thought it would be found then and not later?
  5. Here is some more information for a variety of grounds you could check if you have some time. It's worthwhile. Any connection issue has the potential to make an appearance with lower than normal voltage, so, check it out. Although you didn't have any other symptoms, I still think it's worthwhile and free to research on your truck in your garage. TSB 18-NA-161.pdf PIT5562.pdf
  6. The ground is the terminal with black wires, closest to the firewall. There should be a clamp with two wires coming out of it. One goes to the chassis and the other to the motor. Check where they terminate for corrosion or bad connections.
  7. Just a tip, check your ground connections between the battery and chassis. Specifically where the ground cable meets the frame and/or body. There is the possibility that there is a layer of undercoating or corrosion between the connections.
  8. Are there any drivability issues that have been accompanying the noise? What is the noise you are hearing?
  9. I don't know, I doubt it would know the difference but I haven't tested it. Never drove with my knees.
  10. The "take steering" warning will give you two quick dings at first, but then if you don't touch the steering wheel, it will start chiming continually.
  11. I think I know what you're talking about. My OCD would probably have me re-doing it. By the way there is apparently also a ground under the same location on the passenger side. Although the BCM doesn't ground there so it hasn't been problematic as far as I know.
  12. Seeing that your truck is a 2014 model I would have thought your dealer would have taken a look at all of the TSBs. And the TSB regarding this ground G218 is definitely on par for 2014-2015 models for sure. What's the harness clip that you forgot? TSB 18-NA-161.pdf
  13. Just about as sporadic and elusive as you can get. That's unfortunate.
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