Below is a screenshot from another source that shows where to find the stampings on the passenger side axle tube. Top of the tube, of course in the worst/hardest to reach and see spot. dang
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GM 12 bolt axle code stamp locations.png (408.23 KB, 111 downloads)



~ Dan
1951 Chevy 3 window 3100
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"My Grandpa Carl's Truck and How it Became Mine"
1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver)
US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)