Your truck may have come to you as a 12V but it came from the factory as a 6V. It's possible you still have a 6V starter. Count the teeth on your current flywheel. If it's 139 then you have a 6V starter. You'll need a 6V GMC flywheel to use it.


"It's just a phase. He'll grow out of it." Mama, 1964

1956 Chevy 1/2-ton 3100
1953 Chevy 6100 "The Yard dog"
1954 GMC Suburban Now with a new proud owner.