DD 6-71 serial number year

[Geoff]

Does any one have a book that lists an old 6-71 engine with HV injectors?  I need a printed page saying what year this engine is:

Serial number:

6A23789

Thanks if you can help...

--Geoff

[eagle19952]

is it in the service man handbook....the old small ring binder ?

[Len Silva]

I found this:   http://igor.chudov.com/manuals/Detroit-Diesel/Detroit-Diesel-Series-53/Detroit-Diesel-Engine-Serial-Numbers.pdf

but it only goes back to 1960.  Looks like yours is considerably older than that.

[luvrbus]

Just to help Geoff that is 50 to 52 model high block 2 valve GMC Diesel it won't be listed as a Detroit Diesel

[Geoff]

My posts seem to get deleted on this thread before I can hit the "post" button??