PSI | Standalone Wiring Harness | LS Wiring | LS Wirng PSI specializes in the design and manufacture of Standalone Wiring Harnesses for GM Gen II, III, IV, & V LS/LT based engines and transmissions. These harnesses include the Gen II LT1/LT4, Gen III (24x) LS1/LS6 and Vortec Truck Engines as well as Gen IV (58x) LS2, LS3, LS7, & Vortec and GEN V LT / ECOTEC3 Engines.OverviewProductsInstructionsVORTEC WITH T56/NON-ELECTRONIC AUTOMATIC HARNESS INSTRUCTIONS ProductsPSI Products | Standalone Wiring Harness | LS Wiring | LSStandalone Wiring HarnessesPSI Standalone Wiring Harness | LS Wiring | LS Wiring4L60e/4L80ePSI LS w/4L60E/4L80E (24X) | Standalone Wiring HarnessChevyPSI specializes in the design and manufacture of Standalone Wiring Harnesses for GM Engine Controller KitsPSI Engine Controller Kit | Standalone Wiring Harness | LSSee results only from psiconversionBRAIDED WOVEN LOOM KIT ViewLS EXHAUST MANIFOLDS ViewCRUISE CONTROL FOR GM LS DRIVE-BY-WIRE TCC/BRAKE SWITCH KIT ViewFAN RELAY KIT ViewPSI C10 T-SHIRT - CHARCOAL - WIRE IT UP AND FIRE Parts By VehicleAccessoriesTransmissionOil Pan KitsA/C & CoolingApparel/Gift CertificateFuel SystemsExhaustGauge ClustersPCMSee more on psiconversion psi wiring harness | eBay www›Search›psi wiring harnessFind great deals on eBay for psi wiring harness. Shop with confidence. Skip to main content. eBay Logo: 1992-1993 LT1 PSI STANDALONE WIRING HARNESS W/T56 or NON-ELECTRIC AUTOMATIC See more like this. 1997-2002 LS1/LSX PSI STANDALONE WIRING HARNESS W/4L80E (DBC) Brand New. $574. Wiring Harness Manuals - PSI - Pinterest - STANDALONE WIRING HARNESS conversion wiring swap aftermarket engine wiring harness engine harness swap wire harness tuning drive by wire PSI Conversion Engine Harness and Wiring PSI Standalone Wiring Harness is a complete Plug and Play Harness designed for your engine using a Manual, or Non-Elec Trans. psi harness | eBay www›Search›psi harnessFind great deals on eBay for psi harness. Shop with confidence. Skip to main content. eBay Logo: Shop by category. Shop by category. Enter your search keyword 1 product rating - 1996-1995 OBD-I PSI STANDALONE WIRING HARNESS FOR 5.7 LT1 AND 4L60E AUTOMATIC. $519. Buy It Now +$20 shipping.