I can't help you too much on feedback, but the topic peaked some interest with having an 02 Duramax as well. We also have a 13 Yukon Denali with the shifter like the BD Power TapShifter. I haven't used it in towing and only played with it a few times to see how it worked which I thought was pretty slick when giving the driver the ability to manually shift the tranny. I'll be watching this thread. Also, thought the price I saw when Googling it didn't see too bad.
2013 Yukon
2021 Coachmen Spirit 1943RB