First time poster long time reader. I feel the need to comment on this topic as I have some fresh real world experience with it.I
have a 2019 RST 4X4 double cab with the Z71 package. I will post pics of my build after my new wheels and tires arrive from Tire Rack early January. I live in Idaho and spend a lot of time on the backroads in Montana and Idaho where there are a lot of single track STEEP dirt roads. I have more than once used the hill descent on steep snowy/icy dirt roads where 4Lo 1st gear is just not geared low enough like the 4X4's of old, this is where the hill descent shines. This last weekend we had a rare December 50+ degree weather so I took advantage to get some winter truck tent camping in. As per usual me and my buddy (he drives a Tundra I don't hate lol) ended up on some mountain roads we probably shouldn't have been on and I can say without a doubt that the hill descent reduced my "pucker" factor by a huge amount. My buddy ended up putting on chains to help control his descent. I could feel the ABS working each tire grabbing at the almost non existent traction and even though I slid most of the way down, the hill descent keeped me at a slow pace where as a panic brake lock would have been a sleigh ride to who knows where. I think the hill descent feature is probably not going to be used by 95% of the Silverado crowd but If you ever expect to be in country like I drive it is a highly valuable tool.