gooffeyguy
Tom
When I put on the GM heavy duty brake calipers/pads last year I believe they came with clips that look like the top picGood question. Came across the same issue while doing some research for the NNBS upgrade on my NBS, and I'm still wondering. Here's what RA shows for a 2010:
View attachment 427642
EDIT: Most hardware seems to be the solid clip; here's the difference (square hole on bottom pic):
View attachment 427643
View attachment 427644