GrumpyAeroGuy

Is it possible your headlights are turning on? If it is overcast, the auto headlights can gi on, or off, at will. This could cause this. (???) Sent from my LM-G710 using Tapatalk

I suspect this is a discrete, succinct, issue. As you have an 18, I assume you are still under a b2b warranty. Frustrating, I know. Trip to the dealer seems to be in order here. Almost sounds like a flakey ground, or a loose connector, bad door switch, or something of that order.... My experience suggests that the software is ok, but it is only as good/bad as what's being fed to it as inputs/ variables----which leads back to a potential ground/connector/switch issue, potentially. Sent from my LM-G710 using Tapatalk

Yeah, I was thinking new BCM... Shot in the dark, tho. Sorry man. I can palpate and sympathize with your frustration.... Sent from my LM-G710 using Tapatalk

I seem to recall that there Is a way to export a config file and reimport it via USB port. Never done it. Recall reading that in my manual... OR, I misunderstood what it was trying to say. Maybe this helps... Sent from my LM-G710 using Tapatalk

On-star to locate? Sent from my LM-G710 using Tapatalk

Agreed...had a similar issue about a year ago... Sent from my LM-G710 using Tapatalk

Not only the 14s and 15s. My 2016 hmi module bought the farm as well, recently. This issue seems a bit more prevalent than we think. Sent from my LM-G710 using Tapatalk

Not sure if this applies to any of these codes.... I had remote start fail due to a faulty throttle position sensor...(?) Sent from my LM-G710 using Tapatalk

If you paid by credit catfish, dispute the charge. Trust me, they will contact youngster that... Sent from my LM-G710 using Tapatalk

Yes, most likely. Happens to mine during inclement conditions occasionally. Sent from my LM-G710 using Tapatalk

I had the black screen. Just eeked in prior to bumper to bumper running out. They tried a new hmi cable, and ended up replacing the head unit as well. Keep up the good fight. This issue, if both the hmi and head unit need fixing is most likely well north of $1000. Best of luck. Sent from my LM-G710 using Tapatalk

Looks blue to me (?) Sent from my LM-G710 using Tapatalk

Sounds suspect to me. My camera failed under warranty. They replaced it, and all worked well afterwards, immediately.... ??? Sent from my LM-G710 using Tapatalk

Happened to me too. Hmi module. Sent from my LM-G710 using Tapatalk

1. Good for you. Glad you got this irritant resolved (on your own). I am ocd and would have lost it over something like this. I feel your previous pain. 2. As far gm figuring stuff out....i am batting about .600 with dealerships figuring out legitimate warranty issues that are their issue / responsibility. Sad fact: get used to that. Ref your issue/scenario: been there, done that, got the t-shirt. Case in point : my nav head unit bought it some weeks ago. D-E-D dead. They replaced it. It was acting wonky as hell after they did though, so they told me. Kept it 3 days, no resolution. Insisted on taking it home. It was wonky, that was true, acting bizarre, but working to some degree. Disconnected battery overnight. All normal since. Don't ask me why. That worked. They didn't try that in the 3 days they had it. No judgement. Just observation. Is what it is anymore. Sent from my LM-G710 using Tapatalk