With my vehicles I have found. That some nuts or bolts are metric and some are american standard on the same vehicle
You mean import or domestic(chevy.ford.Dodge.)......METRIC is for tipe of bolts ..screw6..7..8. 9..10..11..12..13..14.etc..etc.......STANDARD...5/8...3/8...7/16...1/2..9/16...5/8..etc..etc.. That what i KNOW it
Being a chevy ,I would think American but these days not sure
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