Lane Change Assist not working

[able969]

Thanks for the detailed explanation!! @borski

 

[GM!]

This is actually partially true. There are two options: you can get to the first detent and then hold it a bit past that point for a moment, or you can just hold it in the “flash to pass“ area before it gets to the first detent. If you let go quickly, it will simply blink three times. If you hold it for an extra moment, it will initiate lane change if possible.

User error on my part. Thanks, Bobby. Now it works.

 

[GM!]

There are a couple requirements:
1) Ensure the lines on the screen are dashed. If they are solid, LCA is unavailable for one reason or another for that lane. If only one is solid, *that* lane is unavailable for LCA, but the other would work fine. This may be due to several reasons, such as a car being present that would prevent it from making the lane change.

2) If you don’t have cell service, LCA will not work. It requires HD map data, which is accessible (at present, at least) only from the cloud. If you don’t have service, the lines will be solid.

3) LCA may pop up a small message that says “Keep hands on wheel.” This is not a suggestion; I consider this a UX bug. That is *exactly the same* as the HA “keep hands on wheel” alert, except it’s a lot less in-your-face. If it says that, it will not make the lane change until you apply torque to the steering wheel, just like HA requires.

4) Other states in which LCA may be unavailable: a solid lane boundary, if you’re about to leave a freeway, if you have your hazard lights on, or are driving <40mph.

More info in the manual: https://publications.infotainment.p...tml#GUID-A81CE97E-943B-4A2A-8186-3118872B185A

Many thanks for the detailed reply, Borski! I was not aware of #2.