ls1 t56 harness | eBay www›Search›ls1 t56 harnessFind great deals on eBay for ls1 t56 harness. Shop with confidence. Skip to main content. eBay Logo: Fine 97-02 DBC LS1 Standalone Wiring Harness With T56 Non-Electric Trans Cover See more like this. 1997-2002 LS1/LSX PSI STANDALONE WIRING HARNESS W/T56 or 1997 - 2004 LS1 W/ T56 STANDALONE WIRING HARNESS (DBW) - PSI Standalone Wiring Harness HAR-1017 is a complete Plug and Play Harness designed for your 1997-04 LS1 DBW engine using a T56 manual or non-electric trans.