{"product_id":"4-pin-15487756-gt-series-ignition-coil-o2-sensor-connector-buick-chevrolet","title":"4-Pin 15487756 GT Series Waterproof Connector – Ignition Coil \u0026 O2 Sensor Buick Chevrolet","description":"\u003ch2\u003e4-Pin 15487756 GT Series Waterproof Connector – Ignition Coil \u0026amp; O2 Sensor Buick Chevrolet\u003c\/h2\u003e\u003cp\u003eDirect-fit replacement for GM OEM part number \u003cstrong\u003e15487756\u003c\/strong\u003e, a 4-pin waterproof GT (Global Terminal) series connector used for ignition coil harness connections and oxygen sensor circuits on Buick and Chevrolet vehicles. The GT series is GM's standardized connector family for high-temperature engine bay applications, designed to withstand the thermal cycling and vibration of ignition coil mounting locations.\u003c\/p\u003e\u003ch3\u003eKey Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Part Number:\u003c\/strong\u003e 15487756\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePin Count:\u003c\/strong\u003e 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGender:\u003c\/strong\u003e Female socket (with wire)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e GT (Global Terminal) series\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWire Gauge:\u003c\/strong\u003e 18 AWG (0.5 mm²)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWire Length:\u003c\/strong\u003e 5.5 inches (140 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWaterproof Rating:\u003c\/strong\u003e IP68\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHousing Material:\u003c\/strong\u003e PA66 glass-filled nylon (high-temp rated)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal Material:\u003c\/strong\u003e Copper alloy, tin-plated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e -40°C to +150°C\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatible Vehicles \u0026amp; Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuick:\u003c\/strong\u003e LaCrosse, Regal, Enclave – 3.6L V6 ignition coil harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChevrolet:\u003c\/strong\u003e Malibu, Equinox, Traverse – 2.4L and 3.6L ignition coil connectors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGMC:\u003c\/strong\u003e Acadia, Terrain – shared platform ignition harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eO2 sensor application:\u003c\/strong\u003e 4-pin wideband oxygen sensor harness on GM 3.6L platforms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCross-reference:\u003c\/strong\u003e Verify OEM part number 15487756 before ordering\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eIgnition Coil Connector Failure – Why It Happens\u003c\/h3\u003e\u003cp\u003eIgnition coil connectors are subjected to extreme conditions: temperatures up to 150°C, high-voltage inductive spikes from the coil primary circuit, and constant vibration. The 15487756 connector fails due to:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eTerminal fretting corrosion from vibration – causes intermittent misfire\u003c\/li\u003e\n\u003cli\u003eHeat-induced insulation cracking – exposes wire conductors to short circuit risk\u003c\/li\u003e\n\u003cli\u003eMoisture ingress after seal degradation – causes coil primary circuit faults\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFault Codes Linked to 15487756 Connector Failure\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eP0300–P0306\u003c\/strong\u003e – Random\/Multiple Cylinder Misfire (most common)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eP0351–P0356\u003c\/strong\u003e – Ignition Coil A–F Primary\/Secondary Circuit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eP0136 \/ P0156\u003c\/strong\u003e – O2 Sensor Circuit (Bank 1\/2, Sensor 2) when used for O2 sensor application\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ: Can a bad ignition coil connector cause a misfire?\u003c\/strong\u003e\u003cbr\u003eA: Yes. A corroded or loose 15487756 connector interrupts the coil primary circuit, preventing the coil from firing. This produces a single-cylinder misfire (P030X) identical to a failed coil. Always inspect and test the connector before replacing the ignition coil – coils cost significantly more than connectors.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: How do I test the ignition coil connector?\u003c\/strong\u003e\u003cbr\u003eA: With the connector disconnected, measure resistance between the terminal contacts – any reading above 0.3Ω indicates corrosion. Visually inspect for green oxidation, bent pins, or cracked housing. Apply dielectric grease to terminals before reconnecting.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: What crimping tool is needed for GT series terminals?\u003c\/strong\u003e\u003cbr\u003eA: Use the Kent-Moore J-38125-8 or equivalent ratchet crimper rated for the GT series terminal wire gauge (18 AWG \/ 0.5 mm²).\u003c\/p\u003e\u003ch3\u003ePackage Contents\u003c\/h3\u003e\u003cp\u003e1 × 4-Pin Female Socket Connector (15487756) with 18 AWG wire and terminal inserts\u003c\/p\u003e","brand":"Cable Parts Online","offers":[{"title":"4P \/ Female with Wire \/ China Mainland|Line Connector|3 Sets","offer_id":47844190421237,"sku":"14:200004889#Female with Wire;200001249:202408832#3 Sets;200007763:201336100;200497261:200000933;462:203053809","price":45.75,"currency_code":"USD","in_stock":true},{"title":"4P \/ Female with Wire \/ China Mainland|Line Connector|10 Sets","offer_id":47844190454005,"sku":"14:200004889#Female with Wire;200001249:202408829#10 Sets;200007763:201336100;200497261:200000933;462:203053809","price":152.4,"currency_code":"USD","in_stock":true},{"title":"4P \/ Female with Wire \/ China Mainland|Line Connector|1 Set","offer_id":47844190486773,"sku":"14:200004889#Female with Wire;200001249:202408830#1 Set;200007763:201336100;200497261:200000933;462:203053809","price":15.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0732\/3494\/0149\/files\/Se83d1c86ad594b15bb8d966654178c145.webp?v=1773810042","url":"https:\/\/www.csldmcml.com\/products\/4-pin-15487756-gt-series-ignition-coil-o2-sensor-connector-buick-chevrolet","provider":"Cable Parts Online","version":"1.0","type":"link"}