I travel to/from BC and Denver quite often (Sierra, 6.2L) sometimes towing a smallish (under 4000 ibs) trailer and sometimes, not. I travel the major highways and, depending on whether the trailer is ...
The Ford with adaptive cruise control applies the wheel brakes when descending down hill and illuminates the brake lights. If the brakes get too hot It sounds a warning and shuts cruise off. Your Chevy might be the same.