I've been trying to decode all my RPO codes and i've found one that doesn't seem to be on there. It's a LB4 code on my sticker, which means my truck has a Gas, 4CYL, 1.2L, MFI, DOHC, Port Deactivation. It surely does not. But I was looking through all the "L" codes, and couldn't find one for a 4.3 TBI V6. The closest I found was the Vortec gen 2 and Vortec gen 3 versions. Does anybody else have a TBI V6 that could show me their codes to see if they've got an engine code?
