Hi, yes I referenced the GM diagram before I started however there is no room to get the allen wrench into the hole to turn the screw because of that protector material they add to the undercarriage to prevent rust...the closest one to the front wheel is accessible however as GM indicated not proper for lifting. Overall I'm concern end about the gap between the rail and the pad within the channel. does not seem to be a proper fut based om n design concept.
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