This stand alone fuel injection wiring harness from Painless Performance®™ fits Crovettes, GTO, SSR, Crate engine from 2005 to 2006. It is designed to work with 6.0L LS2 engines with 24X Crank Reluctor and 2X Cam Reluctor. Included with this harness is an 8 circuit modular fuse block and GM color coded wires with labels for easy installation. For more information, check out the online instruction manual.