Standalone Ls1 Wiring Harness Diagram. All psi harnesses are made in the usa. 2 painless performance products llc 2501 ludelle st.
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Including but not limited to lt1 ls1 lm7 lr4 lq9 lq4 48 53 57 60 62 and 70 engines. We hand build every harness to fit exactly what your project needs and they actually form fit on the engine to make your wiring look and perform perfectly. 97 04 gm ls1 efi harness throttle by wire manual pn 90520 painless performance products recommends you the installer read this installation manual from front to back before installing this harness. However it does not imply connection between the cables.