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LM7 5.3 or 4.8? how can you tell

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Old 06-22-2010, 12:19 AM
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Default LM7 5.3 or 4.8? how can you tell

I found a 5.3, so they say its a 5.3 but how can i make sure it is 5.3.
Where do i look for the vin # on engine. I know about the 8th digit, if its a T then its a 5.3 right? Where are the nubers on the block.
Thanks guys
Old 06-24-2010, 06:06 PM
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It will say 5.3 or 4.8 on the back of the block.
Old 06-25-2010, 02:49 PM
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Originally Posted by sako
I found a 5.3, so they say its a 5.3 but how can i make sure it is 5.3.
Where do i look for the vin # on engine. I know about the 8th digit, if its a T then its a 5.3 right? Where are the nubers on the block.
Thanks guys
I verified the engine I got was a 5.3 was by popping the oil pan off and checking the part number on the crank. The crank and connecting rods on the 5.3 are the same as the 5.7.



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