Detroit diesel engine paint color significance

[RJ]

RJ beat me to the punch, but his info is not quite correct.  The GM Final Vehicle records are available from the Ohio Museum of Transportation.

Thx, Bob, for catching that error.  Must have suffered a "Senior Moment" when I typed that info.

RJ

[Boomer]

When GHL stopped rebuilding their own engines and started purchasing Reliabilts they were painted red at the factory.  I assume that if you purchased a Reliabilt from a DD distributor you could spec your paint color back in the day.