Engine ID 6.0 or 5.3

**htd1964** · 07-21-2007 07:28 PM

Can anyone tell what size engine I purchased from these castings? 12567392 stamped in the engine block and 706 stamped in the heads.

**KySilverado** · 07-21-2007 07:54 PM

Originally Posted by htd1964

Can anyone tell what size engine I purchased from these castings? 12567392 stamped in the engine block and 706 stamped in the heads.

Should be 5.3 or 6.0 stamped on the front of the block. Drivers side cylinder bank. Would be under the alternator and PS pump brackets though.

**Defunct SO** · 07-21-2007 10:15 PM

706 heads are not 6.0.

**xlcooplx** · 07-21-2007 10:42 PM

Originally Posted by KySilverado

Should be 5.3 or 6.0 stamped on the front of the block. Drivers side cylinder bank. Would be under the alternator and PS pump brackets though.

this man speaks the truth. probably 4.8/5.3 block more than likely.

**brian1987** · 07-22-2007 09:46 AM

My block says 4.8/ 5.3l is there a way for me to find out which one it is?

I was told it was a 5.3l

**xlcooplx** · 07-22-2007 11:30 AM

what did it come from? silverado/sierra or tahoe/yukon?

**brian1987** · 07-22-2007 11:42 AM

I was told it was from a silverado/sierra I will email the seller and confirm.

Thread: Engine ID 6.0 or 5.3