1993 GMC Sonoma Owner's Manual - Page 56
1993 GMC Sonoma Manual
Page 56 highlights
Featuves & Controls E K5316 The doorkeysareforthedoors and allotherlocks. \ Whena new vehicleisdelivered,thedealerremovestheplugsfromthe keys, and givesthem to thefirstowner. Eachplughasacodeon it thattellsyourdealeroraqualifiedlocksmithhow to makeextrakeys. Keep theplugs in asafeplace. If youloseyourkeys, you'll beable to havenewonesmadeeasilyusingtheseplugs. 2-4
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