2005 5.3
#11
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Join Date: Nov 2009
Location: Houston, TX
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#12
"trever1t" I was looking at your page on cardomain.com and i see you have a 5.3L L33 HO and mine is a 5.3 LM7 as you said. Whats the difference is your and mine and why are they different cause i thought there were only 2 different 5.3's in that truck
#13
L33 is a aluminum block and adds 15hp over the LM7.
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