Keith. Curious why you're looking for the fuse. Is lane assist not working? I don't know the Suburban is the same or similar, but my 2021 High Country Silverado had the lane assist button on the dash that wouldn't light up at all and also intellibeam, which I don't use, didn't work, and more importantly my cruise control stopped working. It turned out to be a code thrown in the BCM, dealer cleared the code and all working again. I posted here somewhere. If I can find it, I'll edit this. But it wouldn't come on because of the code if that's what you were checking for. If you want to disable it or something, sorry.