GM autos used a different key for door and ignition. Trucks did not. However the only difference in the keys was the part you hold. They are B10 and B11. Trucks used a B10 for all locks.

It is best to re-pin the ignition cylinder to match the door lock since the door lock cylinder usually has the code stamped on it and the ignition cylinder usually doesn't.

"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.