1997-2006 DBC LS1 Standalone Harness with 4L80e Transmission Our LS1 standalone harnesses are designed for installing these new GM EFI engines into your ride, whatever it may be. This swap harness is specific for 1997-2006 5.7 engines with RPO Code LS1 and LS6 with a Drive by Cable (Mechanical) Throttle Body and EV1 Injectors and a 4L80e Transmission. PSI LS w/4L60E/4L80E (24X) | Standalone Wiring Harness 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.
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