{"product_id":"buick-chevrolet-4-pin-gt-series-ignition-coil-o2-sensor-connector-oem-15326815-15487755","title":"Buick \/ Chevrolet 4-Pin GT Series Ignition Coil \/ Oxygen Sensor Connector – OEM 15326815 \/ 15487755","description":"\u003ch2\u003eBuick \/ Chevrolet 4-Pin GT Series Ignition Coil \/ Oxygen Sensor Connector – OEM 15326815 \/ 15487755\u003c\/h2\u003e\n\u003cp\u003eDirect OEM-specification replacement for the Delphi GT series 4-pin waterproof wire harness connector used on ignition coils and oxygen sensors across Buick and Chevrolet GM platforms. Cross-references Delphi \/ GM OEM part numbers \u003cstrong\u003e15326815\u003c\/strong\u003e and \u003cstrong\u003e15487755\u003c\/strong\u003e. Uses the \u003cstrong\u003e1.5mm contact series\u003c\/strong\u003e in black nylon housing — the GT series is GM’s standard connector family for ignition coil and sensor circuits on LS, LT, and Ecotec engine platforms.\u003c\/p\u003e\n\n\u003ch3\u003eWhat Problem Does This Connector Solve?\u003c\/h3\u003e\n\u003cp\u003eThe 4-pin GT series connector is used on two critical engine management circuits on GM vehicles. As an \u003cstrong\u003eignition coil connector\u003c\/strong\u003e, it is located on the valve cover in a high-heat, high-vibration zone. A failed connector causes a cylinder misfire (\u003cstrong\u003eP0300–P0308\u003c\/strong\u003e) and rough running. As an \u003cstrong\u003eoxygen sensor connector\u003c\/strong\u003e, a failed connection causes \u003cstrong\u003eP0130–P0167\u003c\/strong\u003e fault codes, rich\/lean running, and increased fuel consumption. The GT series locking tab is prone to fracturing on high-mileage vehicles, allowing the connector to work loose under vibration.\u003c\/p\u003e\n\n\u003ch3\u003eOEM Part Number Cross-Reference\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eOEM Number\u003c\/th\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e15326815\u003c\/td\u003e\n\u003ctd\u003eDelphi GT 4-pin connector (primary)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e15487755\u003c\/td\u003e\n\u003ctd\u003eDelphi GT 4-pin connector (alternate \/ superseded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e4-Pin Circuit Function (Ignition Coil)\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003ePin\u003c\/th\u003e\n\u003cth\u003eFunction\u003c\/th\u003e\n\u003cth\u003eFailure Symptom if Open\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eCoil power supply (12V)\u003c\/td\u003e\n\u003ctd\u003eNo spark, cylinder misfire P0300–P0308\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eCoil ground\u003c\/td\u003e\n\u003ctd\u003eCoil inoperative\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eIgnition trigger signal from ECM\u003c\/td\u003e\n\u003ctd\u003eNo spark, misfire\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eCoil feedback \/ diagnostic signal\u003c\/td\u003e\n\u003ctd\u003eMisfire detection fault\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eAttribute\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePin Count\u003c\/td\u003e\n\u003ctd\u003e4-Pin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContact Series\u003c\/td\u003e\n\u003ctd\u003e1.5mm pitch (Delphi GT series)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing Material\u003c\/td\u003e\n\u003ctd\u003eNylon, black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSealing\u003c\/td\u003e\n\u003ctd\u003eWaterproof\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOEM Part Numbers\u003c\/td\u003e\n\u003ctd\u003e15326815 \/ 15487755\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplications\u003c\/td\u003e\n\u003ctd\u003eIgnition coil, oxygen \/ lambda sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Models\u003c\/td\u003e\n\u003ctd\u003eBuick LaCrosse \/ Regal \/ Excelle; Chevrolet Cruze \/ Malibu \/ Trax \/ Equinox\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Included\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatible Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuick LaCrosse \/ Regal \/ Excelle GT\u003c\/strong\u003e – Ignition coil and O2 sensor connector\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChevrolet Cruze \/ Malibu \/ Trax\u003c\/strong\u003e – Ignition coil harness connector (Ecotec engine)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChevrolet Equinox \/ Captiva\u003c\/strong\u003e – Oxygen sensor and ignition coil connector\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGM LS \/ LT engine platforms\u003c\/strong\u003e – Coil-on-plug ignition coil connector\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: My Chevrolet Cruze has a P0301 misfire fault — could it be the ignition coil connector?\u003c\/strong\u003e\u003cbr\u003eA: Yes. A loose or corroded 4-pin GT series ignition coil connector is a common cause of P0300–P0308 misfire faults on GM Ecotec engines. The locking tab fractures on high-mileage vehicles, allowing the connector to work loose under vibration. Swap the coil to another cylinder first — if the misfire follows the coil, replace the coil. If it stays on the same cylinder, inspect the connector and wiring.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Are terminals included?\u003c\/strong\u003e\u003cbr\u003eA: Yes, terminals are included with all variants.\u003c\/p\u003e","brand":"Cable Parts Online","offers":[{"title":"1 Pcs \/ male with wires","offer_id":47838108877045,"sku":"14:200003699#male with wires;200001249:202408827#1 Pcs","price":29.48,"currency_code":"USD","in_stock":true},{"title":"1 Pcs \/ female with wires","offer_id":47838108909813,"sku":"14:200004891#female with wires;200001249:202408827#1 Pcs","price":29.48,"currency_code":"USD","in_stock":true},{"title":"1 Pcs \/ male with Pin","offer_id":47838108942581,"sku":"14:200004890#male with Pin;200001249:202408827#1 Pcs","price":18.7,"currency_code":"USD","in_stock":true},{"title":"1 Pcs \/ female with Pin","offer_id":47838108975349,"sku":"14:200004889#female with Pin;200001249:202408827#1 Pcs","price":18.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0732\/3494\/0149\/files\/Sb3bad1a36f324806ab637f61c404814bI.webp?v=1773726854","url":"https:\/\/www.csldmcml.com\/products\/buick-chevrolet-4-pin-gt-series-ignition-coil-o2-sensor-connector-oem-15326815-15487755","provider":"Cable Parts Online","version":"1.0","type":"link"}