The LSA is a designation code(RPO - Regular Production Oder) used by GM for their engines. It is a LS based motor that began use in 1997 and has several codes ranging from LS1, LS3, LS4, LS6, LS7, LS9, etc.
Here's a link to their other codes:
http://www.348-409.com/rpo1.html
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2015 CRT 1SS/1LE RS/Recaro's/NPP/Nav/Rear vision pkg./BA speaker upgrade. Stage 3 BMR cam, ARH 1 7/8 headers, CAI,
BMR 1.25 drop springs, JPSS Billet Bushings, Peddars Cradle Bushings...460 whp...so far....SOLD, but not forgotten!
