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View Full Version : so what is the differance 5.3 and ls3


warscout2
March 27th, 2008, 03:22 PM
so what is the difference between the 5.3 vortech and the ls3

i have a 2001 yukon with the 5.3 vortech what do i set efilive for?
ScarabEpic22
March 27th, 2008, 04:14 PM
LS3 is a newer version of the LS2, 6.2L V8 (LS3) vs 6L V8 (LS2). 5.3 Vortec is a Gen III so set it to LS1 99+.