BobMcC

Got a 2021 Silverado, same erratic operation.

Funny thing, if the adaptine cruise disengages due to a camera/sensor issue you'll get a notice on the DIC. When the Intellibeam won't activate, you get no notice as to why - it just doesn’t turn on the system or the "A" indicator on the DIC.

I guess you've traded it off by now. I have a 2021 Silverado 1500 LTZ and I'm having the same issue with the intellibeam switch on turn signal stalk not being able to activate the system. As well as, sometimes it turns itself off without touching the switch. Thank God, when I do get it to turn on, the system works correctly and doesn't flash off/on like yours did. I'm an electronics technologist and I know intermittent issues like this are the hardest to find. I wish there was a known fix for this problem.