88-98 silverado/sierra and the tahoe/burb and their twins all used the same door along with the 2nd gen S10s. It's about the best one I've seen to use. As mentioned, it has the "finger hole" (giggity) it's relatively flat to match the contours on both a step and fleet side truck. I have one on my stepside and I cut one out for my fleet project (haven't installed it yet.)
This is "gringolocos" truck, I'm going to copy his location for mine:
This is my stepside:
