2005 up 6.0L Block casting numbers??
07-02-2013, 06:28 PM
#11
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on the passenger side of my block (bottom, next to oil pan across from where the oil filter is on the other side of the motor) it is stamped 12573704
I have googled the hell out of this serial number/casting number and cant figure out what type of block it is.
I have 241 heads, aluminum V8 block and truck intake
It is literally driving me crazy that I cant figure out what type of car/truck this motor came out of.
Please help!
I have googled the hell out of this serial number/casting number and cant figure out what type of block it is.
I have 241 heads, aluminum V8 block and truck intake
It is literally driving me crazy that I cant figure out what type of car/truck this motor came out of.
Please help!
10-21-2013, 12:35 PM
#12
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serial number
You can find the block casting number
On the backside of the block( behind the
flexplate) if its out of the vehicle...
The serial number is on the rear left side
Of the block , right below the cylinder head.
It looks like the old " Dot matrix" numbers/ letters.
Might have to wire brush the surface to see them
Though. Hth.
Ben Smith
On the backside of the block( behind the
flexplate) if its out of the vehicle...
The serial number is on the rear left side
Of the block , right below the cylinder head.
It looks like the old " Dot matrix" numbers/ letters.
Might have to wire brush the surface to see them
Though. Hth.
Ben Smith
10-21-2017, 10:16 AM
#14
Cable throttle body tells me 5.7.
The 6.0's that came in the cars with car intakes are DBW. The 05-06 GTO and the corvettes at the time all used drive by wire throttle bodies. Cable throttle body and car intake points towards a 5.7.
Also the cylinder head casting number and the date printed on the front of the block near the water pump should also tell you what month and year it was made. It's like a 4 digit code I think with 1 letter and 3 numbers.
The 6.0's that came in the cars with car intakes are DBW. The 05-06 GTO and the corvettes at the time all used drive by wire throttle bodies. Cable throttle body and car intake points towards a 5.7.
Also the cylinder head casting number and the date printed on the front of the block near the water pump should also tell you what month and year it was made. It's like a 4 digit code I think with 1 letter and 3 numbers.
11-18-2019, 10:42 PM
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Just as Joe said, to truly identify what year block you have, you will have to read the date code and not try to just rely on the casting number. Below are just some examples of casting numbers GM used for iron 6.0L’s.
12551364...364...99-06...crossbolted cast iron, Gen. III, 6.0L, truck
12573581...364...99-06...crossbolted cast iron, Gen. III, 6.0L, truck
12577184...364...99-06...crossbolted cast iron, Gen. III, 6.0L, truck
12551364...364...99-06...crossbolted cast iron, Gen. III, 6.0L, truck
12573581...364...99-06...crossbolted cast iron, Gen. III, 6.0L, truck
12577184...364...99-06...crossbolted cast iron, Gen. III, 6.0L, truck
Where are you finding block casting number decoders.. I had a guy biuld mine 7223 miles ago an he ripped off my heads an roller rockers an cam, they came stock in my motor bought the truck brand new off the dealership floor.. it had 260k miles an I hydrolock it.. 7223 miles an it blew again.. got back a biuld that my 3 year old could have done.. back to my original question.. it is out of a 06 GMC Sierra 2500 hd I know it's an LQ4 but no idea what the rest of the specks are..
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