Haven't had this issue before.

But yes, the parking break will sometimes engage itself when parking. I think it does so when it senses that you may be parked on a slight incline or something. I usually find that it automatically engages it fairly appropriately. I don't know if I've had issues with it disengaging automatically. If it was engaged automatically, usually it seems to auto disengage after shifting out of park. Since I use creep, if the car doesn't creep as I release the break pedal, I'll usually know to check the parking brake.

 

Thanks for sharing that. Yeah, I seem to remember reading something in the manual about the car automatically engaging the parking brake if roll is detected. And yes, the note the @Zymurgy mentioned - though not clear when the car would decide to do this. I also have one-pedal off for creep, and I know exactly what you mean when it doesn't do that. But I've never actually released the parking brake, just pressed the accelerator and it auto-releases. Just odd it does this inconsistently in my garage (which is pretty flat) - would more expect and all the time or never thing.

Anyway, not too concerned about that then given it happens to others also - just odd it is random. The error message has me worried a bit as I will be taking the car on a long road trip in a couple weeks. Don't care if the park brake doesn't come on or doesn't work, but it would stink if it decided to apply and not release. Onstar wants me to take it in, but without any codes and without the error active, think I'll wait to see if it happens again.

 

I haven't gotten any kind of error message, but I have noticed that sometimes the Parking Brake is applied when I didn't do it. I found this in the Owners Manual:

The vehicle may automatically apply the EPB
in some situations when the vehicle is not
moving. This is normal, and is done to
periodically check the correct operation of
the EPB system, or at the request of other
safety functions that utilize the EPB.

 

Was it a one-off message or is the parking brake error/warning light also staying illuminated?

 

Was it a one-off message or is the parking brake error/warning light also staying illuminated?

Good question. Well, at least after the message went away (was only up a few seconds), there was no parking brake trouble indicator icon. So it seems it was a transient problem and not full-time problem.

 

FWIW, the Bolt's parking brake engages automatically when you put it in Park while on an incline. I wouldn't be at all surprised if the behavior was the same in the Lyriq.

I would prefer that the system either always automatically engage the brake or never (user-selectable). This sometimes-it-will, sometimes-it-won't game is terrible UX behavior.

 

FWIW, the Bolt's parking brake engages automatically when you put it in Park while on an incline. I wouldn't be at all surprised if the behavior was the same in the Lyriq.

I would prefer that the system either always automatically engage the brake or never (user-selectable). This sometimes-it-will, sometimes-it-won't game is terrible UX behavior.

Yes, my Model 3 did this. In fact, that is how Park was handled - using the parking brake to hold the vehicle instead of the parking pawl. No roll, and released automatically when shifting out of park. Lyriq won't release the parking brake until you press the accelerator (or I assume the parking brake switch). And agree that random / indeterminate park brake application make no sense.

Also not sure why GM is still using a parking pawl at all, unless they were concerned about the number of cycles on the parking brake. A parking pawl is normally associated with a mechanical gear selector - sliding a pin in the transmission when you physically moved the selector to park. With this method, you have the lurch after shifting to park and then releasing the brake. That is, if there is any small incline.