{"product_id":"gm-lt-l86-l83-engine-and-10l80-10l90-transmission-wiring-harness","title":"GM LT L86\/L83 Engine and 10L80\/10L90 Transmission Wiring Harness","description":"\u003cp\u003e\u003cstrong\u003e2018 and Later GM LT L86\/L83 Engine and 10L80\/10L90 Transmission Wiring Harness\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis harness is built for standalone Drive-by-Wire engine management with a 10L80\/10L90 automatic transmission. It integrates the fuse\/relay box, sensor connectors, engine control wiring, fuel pump control, fan control, OBD2 connection, and supporting outputs needed for a clean LT engine control installation.\u003c\/p\u003e\n\u003cp\u003eL86 and L83 engines were introduced in 2014, but were originally paired with 6L80\/6L90 or 8L90 transmissions. This harness is only compatible with L86\/L83 applications paired with the 10L80 or 10L90 transmission, which appeared starting in the 2018 model year. Confirm transmission pin count, pedal and throttle body requirements, oxygen sensor layout, MAP\/MAF connections, and power\/ground routing before installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003e2018 and later L86\/L83 engines paired with a 10L80 or 10L90 transmission\u003cbr\u003e(L86\/L83 engines from 2014–2017 typically used a 6L80\/6L90 or 8L90 transmission — not compatible with this harness)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003cbr\u003eL86 and L83 engines were introduced in 2014, but were originally paired with 6L80\/6L90 or 8L90 transmissions. This harness is only compatible with L86\/L83 applications paired with the 10L80 or 10L90 transmission, which appeared in later model years (2018+).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003cbr\u003e- Chevrolet Silverado 1500 (2019 and later, L83\/L86 with 10L80)\u003cbr\u003e- GMC Sierra 1500 (2019 and later, L83\/L86 with 10L80)\u003cbr\u003e- Chevrolet Tahoe \/ Suburban (2019 and later, L83\/L86 with 10L80, RST Performance Edition and other trims)\u003cbr\u003e- GMC Yukon \/ Yukon XL (2019 and later, L83\/L86 with 10L80, Denali and other trims)\u003cbr\u003e- Cadillac Escalade (2019 and later, L86 with 10L90)\u003cbr\u003e- LS\/LT engine swap applications using an L86\/L83 engine paired with a 10L80 or 10L90 transmission\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSPECIFICATIONS\u003c\/strong\u003e\u003cbr\u003eThrottle: Drive-by-Wire\u003cbr\u003eHarness Length: Standard\u003cbr\u003eFuse Block: Included\u003cbr\u003eQuantity: Sold as a Kit\u003cbr\u003eIncluded: Fuse\/Relay Box and Plugs\u003cbr\u003eFuel Pump Control\u003cbr\u003eFan Controls\u003cbr\u003eCheck Engine Light\u003cbr\u003eSpeedometer\u003cbr\u003eTachometer\u003cbr\u003eOBD2\u003cbr\u003eAccelerator Pedal and Throttle Body Control\u003cbr\u003eMAF Sensor\u003cbr\u003eMAP Sensor\u003cbr\u003eEngine Coolant Temp Sensor\u003cbr\u003eAlternator Control\u003cbr\u003e(2) Upstream Oxygen Sensors\u003cbr\u003eCrankshaft Position\u003cbr\u003eCamshaft Position\u003cbr\u003eCoil Packs\u003cbr\u003eTransmission Control\u003cbr\u003eKnock Sensors\u003cbr\u003eConnections: GM28604913 (Driver Side) – Needed to Complete Installation\u003cbr\u003eGM28605173 (Passenger Side) – Needed to Complete Installation\u003cbr\u003eNot Included: Fuel Injectors\u003cbr\u003eFuel Injector Sub Harnesses\u003cbr\u003e\u003c\/p\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":49903146926376,"sku":"WH1223","price":770.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/WH1223_01.jpg?v=1741367202","url":"https:\/\/www.topstreetperformance.com\/products\/gm-lt-l86-l83-engine-and-10l80-10l90-transmission-wiring-harness","provider":"Top Street Performance","version":"1.0","type":"link"}