GMC CarbonPro Tonneau Cover Drill Guide
thingiverse
This drill jig is used on GM CarbonPro equipped trucks to locate and drill the hole for mounting a tonneau cover. You'll need a M6 J-Nut insert from Amazon and a corresponding M6-1 flange bolt. - Amazon M6 U-Nut: https://www.amazon.com/gp/product/B00C3MUY9K - Amazon M6-1 Flange Bolt: https://www.amazon.com/gp/product/B0040CWWS2 Along the bed rail under the plastic cap are six locations, 5 require the J-Nut and drilled hole through the bed rail cover. Drill the initial hole with a 1/4" drill. You may want to increase the hole diameter to 5/16" for a little more clearance during installation..
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