Hello everybody!! I need some help i am buying a motor and I'm trying to find what its out of.
I have called my local dealer and they say that they can't help me. I am trying to find what its from. The stamping on the block is ( T0104UHN or T0104UHW or t0104UHH ) its kind of hard to read. If anybody can help me i would appreciate..

Thanks Mike

 

What it supposed to be, a 4,6, smallblock, bigblock, ls?

 

It's a 4.3 v6

 

There must be some more numbers on it somewhere.
Those numbers don't sound like Automotive Serial Numbers.
Castin Numbers? Maybe.
Keep in mind GM Built these motors for a lot of different uses on an Industrial and Marine platform as well.

I think there might be some numbers on the front of the block, passenger side behind the alternator.

Let me know if you find some different numbers and I can tell you what it is but those numbers you have there don't come up under any GM Automotive Application I can find.

Good luck,

 

Take a photo of it too.