http://www.jcscoops.com/performance/...gine_specs.php
here lm4 specs from the trailblazer
http://media.gm.com/division/2004_prodinfo...azer/specs.html
i think this was the first 5.3 (99&#39
http://media.gm.com/corpcom/98news/p980105b.htm
after searching more lm4/lm7/l59
http://www.gm.com/automotive/gmpowertrain/...ehicle/5300.htm