{"product_id":"michigan-motorsports-ignition-coil-harness-connector-direct-fit-for-gm-lq9-lsx-4-8-7-0l-oe-pinout","title":"Michigan Motorsports Ignition Coil Harness Connector — Direct-Fit for GM LQ9–LSX 4.8–7.0L, OE Pinout","description":"\u003cp\u003e\u003cstrong\u003eMichigan Motorsports replacement ignition coil harness connector restores reliable electrical connection for GM truck and LS-series coil packs.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf your factory coil harness has become brittle, cracked, or intermittent from heat and age, this direct-fit Michigan Motorsports harness is built to match OE wiring and pinouts for a wide range of GM 4.8L–7.0L engines. Sold as individual harnesses — select quantity 2 for a full eight-coil set — it replaces part number 89017477 and supports common truck and LS coil designs so you can fix misfires or wiring failures without rewiring or splicing.\u003c\/p\u003e\n\n\u003ch3\u003eWhich engines and coil types will this harness fit?\u003c\/h3\u003e\n\n\u003cp\u003eThis harness is designed for many GM V8 and V6 coil packs used in Chevy, GMC, and Cadillac applications. It covers LQ9, LQ4, LS2, LS3, LS7, LSX and common truck coils spanning 4.8L, 5.3L, 6.0L, 6.2L, and 7.0L engines. Note it does not fit D580 LS1 coils.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eDirect replacement for GM part 89017477.\u003c\/li\u003e\n  \u003cli\u003eCompatible with D581 (12558693), D585 (10457730 \/ 19005218), D513A (12570616), D514A (12573190), D510C (12570616).\u003c\/li\u003e\n  \u003cli\u003eDesigned for the same pin layout and connector body as OEM harnesses for easy plug-and-play installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I install it correctly to avoid misfires?\u003c\/h3\u003e\n\n\u003cp\u003eInstallation is straightforward when you match connectors by wire color and cylinder firing order. Each harness connector has a colored second wire — follow the color mapping to ensure each coil goes to the correct cylinder and retain the OEM routing to prevent heat damage.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003ePurple wire → coil firing cylinder 1 or 8.\u003c\/li\u003e\n  \u003cli\u003eRed wire → coil firing cylinder 2 or 7.\u003c\/li\u003e\n  \u003cli\u003eBlue wire → coil firing cylinder 3 or 6.\u003c\/li\u003e\n  \u003cli\u003eGreen wire → coil firing cylinder 4 or 5.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the main benefits compared with keeping the old harness?\u003c\/h3\u003e\n\n\u003cp\u003eReplacing a degraded harness restores consistent coil voltage and reduces intermittent misfires caused by cracked insulation or corroded terminals. A fresh harness improves reliability under heat and vibration without needing coil pack replacements, saving time and money compared with diagnostic guesswork.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eRestores secure electrical connection to coil packs and eliminates brittle wiring failures.\u003c\/li\u003e\n  \u003cli\u003ePrevents recurring misfires by delivering stable signals and power to coils.\u003c\/li\u003e\n  \u003cli\u003eSaves installation time—OEM-form connector and correct pinout mean no cutting or rewiring.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this harness work with aftermarket or MSD coils?\u003c\/h3\u003e\n\n\u003cp\u003eYes — the harness supports several common OE coil designs and is compatible with many aftermarket coils that accept the same connector styles. Verify connector style against your coil model before purchase; this harness matches the listed GM coil part numbers and most plug-in aftermarket equivalents.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eCompatible with MSD 8287-style and OE-equivalent plug designs when pinouts match.\u003c\/li\u003e\n  \u003cli\u003eConfirm physical connector shape and terminal count with your coils prior to installation.\u003c\/li\u003e\n  \u003cli\u003eDoes not fit unique LS1 D580 coil connectors.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This Michigan Motorsports ignition coil harness connector is aimed at owners and technicians working on Chevy, GMC, or Cadillac trucks and LS-series engines who need a reliable, direct replacement for aging or damaged coil wiring. It’s ideal for DIY mechanics restoring ignition reliability, service shops eliminating intermittent misfires quickly, or anyone swapping coil packs who wants correct OEM-style connectors without cutting into factory wiring.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need two harnesses for a full vehicle replacement?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes—choose quantity 2 to replace the full eight-coil harness set on most GM V8 applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this fit LS3 coil packs?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes—it fits LS3 coil packs using the D510C\/12570616 connector design.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Michigan Motorsports","offers":[{"title":"Default Title","offer_id":48080847569054,"sku":"B06Y2FJ414","price":79.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/michigan-motorsports-front-view-connector.jpg?v=1785790245","url":"https:\/\/northtrailauto.ca\/products\/michigan-motorsports-ignition-coil-harness-connector-direct-fit-for-gm-lq9-lsx-4-8-7-0l-oe-pinout","provider":"North Trail Auto","version":"1.0","type":"link"}