{"product_id":"2014-gen-v-lt1-direct-injection-automatic-manual-transmission-standalone-harness","title":"2014+ Gen V LT1 (Direct Injection) Automatic\/Manual Transmission Standalone Harness","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eAPPLICATION:\u003c\/strong\u003e ALL Gen 5 LT direct-injected engines, 5.3L, 6.2L, 6.6L, from 2014-2026.\u003c\/p\u003e\u003cp\u003eThis is a harness-only kit — the ECM is sold separately. PSI's Gen V ECM line (PCM-2001, PCM-2003, PCM-2004, PCM-2006) covers the various Gen V LT applications; contact us to source the correct ECM part number for your specific engine and model year, or see our complete \u003ca href=\"\/products\/gen-5-direct-injection-2014-lt1-lt4-engine-controller-kit\"\u003eKIT-LT1 Engine Controller Kit\u003c\/a\u003e which bundles a programmed ECM (and TCM for 8\/10-speed) with the harness.\u003c\/p\u003e\u003ch3\u003eDBW Only — Important for OBS Installs\u003c\/h3\u003e\u003cp\u003eLike all Gen V direct-injection LT applications, this harness is drive-by-wire (DBW) only — there is no cable-throttle option. If you select \"Add Corvette Pedal (ACC-1007)\" you will still need our separate \u003ca href=\"\/products\/1973-1998-chevy-truck-drive-by-wire-throttle-pedal-bracket\"\u003e1973-1998 Chevy Truck Drive By Wire Throttle Pedal Bracket (BRK-7398, $65)\u003c\/a\u003e to mount that pedal correctly in an OBS cab.\u003c\/p\u003e\u003ch3\u003eParts Included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eComplete engine and transmission wiring harness\u003c\/li\u003e\n\u003cli\u003eInstruction manual\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFuel Rail Pressure Sensor Type\u003c\/h3\u003e\u003cp\u003eNot offered as a variant (too granular to select by year alone) — please specify your engine's exact model year in the order notes at checkout so we ship the correct harness connector for your Fuel Rail Pressure sensor:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e2014-2016: 4-wire\u003c\/li\u003e\n\u003cli\u003e2017 Corvette: 4-wire\u003c\/li\u003e\n\u003cli\u003e2017 Camaro\/Truck\/CTS-V: 3-wire\u003c\/li\u003e\n\u003cli\u003e2018+: 3-wire\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eConnections For\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFuse\/Relay Box\u003c\/li\u003e\n\u003cli\u003eFuel Pump Control (relay included)\u003c\/li\u003e\n\u003cli\u003eFan Controls\u003c\/li\u003e\n\u003cli\u003eCheck Engine Light, OBD2 Port\u003c\/li\u003e\n\u003cli\u003eAccelerator Pedal\u003c\/li\u003e\n\u003cli\u003eThrottle Body\u003c\/li\u003e\n\u003cli\u003eMAF Sensor\u003c\/li\u003e\n\u003cli\u003eMAP Sensor\u003c\/li\u003e\n\u003cli\u003eEngine Coolant Temp Sensor\u003c\/li\u003e\n\u003cli\u003eAlternator Control\u003c\/li\u003e\n\u003cli\u003e(2) Upstream Oxygen Sensors\u003c\/li\u003e\n\u003cli\u003eCrankshaft Position\u003c\/li\u003e\n\u003cli\u003eCamshaft Position\u003c\/li\u003e\n\u003cli\u003eFuel Injectors\u003c\/li\u003e\n\u003cli\u003eCoil Packs\u003c\/li\u003e\n\u003cli\u003eAutomatic or Manual Transmission Control\u003c\/li\u003e\n\u003cli\u003eKnock Sensors\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTransmission Compatibility\u003c\/h3\u003e\u003cp\u003eAll 8 + 10 speed TCM tuning REQUIRES your TUN (Transmission Unique Number). Without the TUN#, we cannot guarantee a compatible transmission, and warranties cannot be honored without this information.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e6L80\/90E:\u003c\/strong\u003e Must be 2013+ model year transmissions to work with a Gen 5 LT system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e8L80\/90E:\u003c\/strong\u003e 2014-2018 Gen 1 model years currently compatible. Gen 2 8-speeds (2019+) are NOT compatible.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10L80\/90E:\u003c\/strong\u003e All 2017-2018 Gen 1 10-speed transmissions are compatible. 2019-21 2WD Truck\/SUV and all 2019+ GM Performance and Camaro are compatible. 2022+ Gen 2 10-speed transmissions with electronic transmission range select (ETRS) are NOT compatible — these ETRS transmissions will only have a \"park\" and \"out of park\" position on the external shift lever on the driver side of the transmission.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFuel System\u003c\/h3\u003e\u003cp\u003eThis setup uses a fuel pump relay to send 12V power directly to a standard constant-supply fuel pump, paired with a return-style regulator (regulated to 78 psi) rather than the factory PWM fuel pump control module (FPCM). See our \u003ca href=\"\/collections\/obs-fuel-system-swap\"\u003eOBS Fuel System Swap collection\u003c\/a\u003e (KIT-1020 \/ KIT-1021) for compatible return-style fuel system pairings. If a PWM fuel pump \/ factory FPCM setup is required for your fuel tank, PSI also offers an add-on kit (KIT-1006) to accomplish this — contact us for details.\u003c\/p\u003e\u003ch3\u003eTuning Disclaimer\u003c\/h3\u003e\u003cp\u003eThe installed tune is a base\/startup tune, mirroring a factory OEM tune based on the options selected in your order. The tune will remove VATS (Vehicle Anti-Theft System), bypass VVT (if applicable), disable DOD (if applicable), and remove restrictions preventing operation of the engine when installed in a different vehicle.\u003c\/p\u003e\u003cp\u003eAny engine or transmission modifications will REQUIRE a custom tune to ensure proper operation and prevent serious damage. PSI Conversion cannot be held responsible for issues related to operation or performance when the engine\/transmission has been modified, or varies from the options selected when the tune was installed.\u003c\/p\u003e\u003ch3\u003eNotes\u003c\/h3\u003e\u003cp\u003eThese harnesses are designed for retrofitting '14+ LT1\/L83\/L86 GEN V engines from Camaro, Corvette, Suburban, Tahoe, Yukon, Escalade, Silverado, and Sierra into older muscle cars and street rods. All harnesses require PCM VATS removal, available through PSI — contact us for more information. Harnesses are professionally constructed from Brand New GM Factory\/OEM Connectors and TXL High Temperature Wire to GM Specifications, and are 100% quality inspected prior to shipping. Harness length is 4-5 feet from the rear of the cylinder head to the PCM mounting position, with a sliding grommet seal for a professional, leak-proof installation.\u003c\/p\u003e\u003cp\u003eReal-world proof: this exact harness has already been used in a GMC OBS truck LT swap by one of our verified customers (reviewer \"91 C1500\"), who confirmed it as a great fit with great pricing for a GMC OBS LT swap.\u003c\/p\u003e","brand":"PSI Conversion","offers":[{"title":"6L80\/6L90E (2013+) \/ Bare Harness, No Loom \/ No Pedal (Supply My Own)","offer_id":58568725692576,"sku":"HAR-LT1-6L80-BARE-NOPED","price":1029.0,"currency_code":"USD","in_stock":true},{"title":"6L80\/6L90E (2013+) \/ Bare Harness, No Loom \/ Add Corvette Pedal (ACC-1007)","offer_id":58568725725344,"sku":"HAR-LT1-6L80-BARE-CORV","price":1158.99,"currency_code":"USD","in_stock":true},{"title":"6L80\/6L90E (2013+) \/ Bare Harness \u0026 DIY Braid Kit \/ No Pedal (Supply My 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