2021 Yukon AT4
Hoping someone might have info on this? This is the craziest thing I've ever seen in a car, and frustrating that it's the most expensive vehicle I've ever bought. Got it used few months ago, and after a week or so it had the first episode where the entire electrical/computer/control system just goes completely haywire. The gauges bounce like crazy, speedometer just drops to 0 and back, it rotates through pretty much every warning and service required notice, etc. Sometimes the air will go full blast/full heat, the sound will be stuck on whatever setting or just completely off or full blast, there is no sound when the blinker is on, etc. It will last for days or minutes at a time.
As far as I KNOW, it's not the performance of the vehicle, but I have no idea if the blinkers are actually working, if the ABS is online, etc. Took it local dealer, they worked with regional GM specialist, and no luck identifying or diagnosing the problem, let alone fixing it. I've tried contacting GMC a few times, they finally said "we'll escalate to a level 2" but that was a week ago.
I can't post videos apparently, but I made a twitter account (barf) just to try to get someone's attention at GMC. (FYI - passenger recorded while I was driving for those concerned)
Hoping someone might have info on this? This is the craziest thing I've ever seen in a car, and frustrating that it's the most expensive vehicle I've ever bought. Got it used few months ago, and after a week or so it had the first episode where the entire electrical/computer/control system just goes completely haywire. The gauges bounce like crazy, speedometer just drops to 0 and back, it rotates through pretty much every warning and service required notice, etc. Sometimes the air will go full blast/full heat, the sound will be stuck on whatever setting or just completely off or full blast, there is no sound when the blinker is on, etc. It will last for days or minutes at a time.
As far as I KNOW, it's not the performance of the vehicle, but I have no idea if the blinkers are actually working, if the ABS is online, etc. Took it local dealer, they worked with regional GM specialist, and no luck identifying or diagnosing the problem, let alone fixing it. I've tried contacting GMC a few times, they finally said "we'll escalate to a level 2" but that was a week ago.
I can't post videos apparently, but I made a twitter account (barf) just to try to get someone's attention at GMC. (FYI - passenger recorded while I was driving for those concerned)
