2005 up 6.0L Block casting numbers?? - Page 2 - PerformanceTrucks.net Forums

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2005 up 6.0L Block casting numbers??

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Old 07-02-2013, 06:28 PM
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Originally Posted by Wickedcustoms View Post
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!

sounds like an fbody longblock with truck intake.
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Old 10-21-2013, 12:35 PM
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Talking 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.
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Old 10-21-2017, 09:50 AM
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Default Can any1 help tell me what motor this is

Please help is it a 5.7 gen 3 or is it a 6.0 ?

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Old 10-21-2017, 10:16 AM
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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.
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Old 10-21-2017, 10:19 AM
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It's a 99 LS1
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Old 10-21-2017, 10:24 AM
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Now sell it because people think they are worth gold, then pick up a 5.3 for 1/3rd the price. Use the rest for mods.


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