Yeah I put 2" leveling shackles on my '07 Sierra shortie (with help from 2 friends), improved the look of the truck immensely. I understand GM has an engineering rule with pickup trucks: the rear bumper must be 2" higher than the front when unladen. This looks worse on the shortbed, with an embarrassing amount of wheelwell showing, imo. The longbed has more length so it doesn't look as severe. Just leveling it would make it look different enough, maybe, without taildragging it, but I was thinking just one inch lower than level might look cool.
Nearly all trucks are a few inches higher in the rear. If not they all would be tail draggers iif you have anykind of a load.
Most people do not like the tail low as in a truck often it is mistaken for a bad set of springs or a load in the bed. That is why I think this look is not seen outside the small low riders.
God knows the second gen short bed S10/Sonoma had rear spring issues and for a few years they were seen with the tail down on nearly all. The first question always was whats wrong? I think GM put out a TSB but never recalled them.
I am not sure how soon you need a truck but GM kicks in a good sale are rebate in Oct every year. Often it is enough to buy you the wheels. The GM SPO wheels are a must on these trucks.