6.2/6.5 Cylinder Block Date Code

[chickenhunterbob]

I would probably have guessed 141 suffix was BETWEEN 929 and 506, but may well have been wrong, it wouldn't be the first time.

[dieseldummy]

I too thought that the 141 number was between the 929 and 506. The only thing I've ever seen a 141 in is an early '96 without the cooling upgrades. As best I could tell the 141 was almost identical to the 599 except for the oil pressure sender location and a couple of minor details. I also thought that the 929 number was the GM goodwrench number that was equal to the origional 599?

[ronniejoe]

I have a 929 block at the machine shop right now that is a 1995 casting out of a 95 truck. So I would have to argue that the 141 came after the 929...

[vongassit]

Thank you. Was that year any good? I am planing putting one in my 22.5 ft sea ray and the other in a 04 dodge ram 1500 SLT, am sure glad i found this forum

[More Power]

The late 1996-2000 GM manufactured blocks did crack somewhat more frequently than earlier GM blocks. Not all of them cracked, but...

Pull the center 3 main caps and look for cracks originating at the outer or inner bolt holes in the main webs. If yours are crack-free, you might be OK.

Jim