There are two ground WIRES that are attached to ONE eyelet. Maybe the diagram at this site would help (if the PU trucks are the same), but I don't know in what year your harness was born:
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I appreciate your help my harness is from a 2005 Tahoe, I screenshotted the diagram and I circled where I don’t understand, what is the 1 wire and is 2 the double ground that is attached to the eyeletThere are two ground WIRES that are attached to ONE eyelet. Maybe the diagram at this site would help (if the PU trucks are the same), but I don't know in what year your harness was born: