First, you cannot use the Sidewinder with the Companion hitch in it's standard configuration. The Sidewinder with it's wedge puts too much twist on the single mounting point of the Companion. In the past, B&W has OK'ed the combo if additional bolts are added at the 4 corners of the base to prevent twisting.
Otherwise, you don't need a slider if you can just pay attention (which should be every drivers goal). GM has the longest cab to axle distance. 90 degree turns at full steering wheel cut will not be a problem. Larger turns will be, but they can be problematic for sliders and 8 ft beds also. Generally, taking more time and jockeying back and forth can solve most problems. I don't use a slider and have used GM short beds for 25+ yrs. But then sliders weren't available 25 yrs ago, so there was no option except to pay attention.
