1999 5.3 liter Vortec V-8

[Chipsbyal at aol.com]

I'm not sure about the module match. The 97 and later LS1 series engine, 
which is now in the new trucks with a different intake, have no distributor 
or high voltage switch. The ignition is CNP coil near plug. Each cylinder has 
its own module, coil, coil to plug wire and they're all the same. The PCM or 
now VCM controls each cylinder's spark timing individually, similar to the 
injectors. It does use a new PCM for these, the old truck L 31 with the eight 
poppet injectors (out of sight) has its own PCM family. The new engines have 
external injectors, like most PFI systems. 
----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org