{"product_id":"gm-8-pin-headlight-connector-oem-15326654-15326655","title":"GM 8-Pin Headlight Wire Harness Connector – OEM 15326654 \/ 15326655 Direct Fit","description":"\u003ch2\u003eGM 8-Pin Headlight Wire Harness Connector – OEM 15326654 \/ 15326655 Direct Fit\u003c\/h2\u003e\n\u003cp\u003eDirect OEM-specification replacement for the GM 8-pin headlight wire harness connector. Cross-references General Motors part numbers \u003cstrong\u003e15326654\u003c\/strong\u003e and \u003cstrong\u003e15326655\u003c\/strong\u003e. Used in headlight assemblies across Chevrolet, GMC, and Buick platforms where low beam, high beam, DRL, and turn signal circuits share a single 8-pin connector housing.\u003c\/p\u003e\n\n\u003ch3\u003eWhat Problem Does This Connector Solve?\u003c\/h3\u003e\n\u003cp\u003eThe GM 8-pin headlight connector is a common failure point on high-mileage trucks and SUVs. Moisture ingress through the headlight housing seal causes selective pin corrosion — the DRL and turn signal pins (lower current) corrode first, while the high-current beam pins remain functional. This produces confusing fault patterns: headlights work but DRL warning is on, or turn signal flashes erratically. Replacing the connector resolves these faults without replacing the headlight assembly.\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\u003e15326654\u003c\/td\u003e\n\u003ctd\u003ePrimary 8-pin headlight harness connector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e15326655\u003c\/td\u003e\n\u003ctd\u003eAlternate \/ superseded part number\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e8-Pin Circuit Function (Typical GM Layout)\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003ePin Group\u003c\/th\u003e\n\u003cth\u003eFunction\u003c\/th\u003e\n\u003cth\u003eFailure Symptom if Open\/Corroded\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePins 1–2\u003c\/td\u003e\n\u003ctd\u003eLow beam power and ground\u003c\/td\u003e\n\u003ctd\u003eLow beam not illuminating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePins 3–4\u003c\/td\u003e\n\u003ctd\u003eHigh beam power and ground\u003c\/td\u003e\n\u003ctd\u003eHigh beam not illuminating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePins 5–6\u003c\/td\u003e\n\u003ctd\u003eDRL power and ground\u003c\/td\u003e\n\u003ctd\u003eDRL fault, B2590 DTC stored\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePins 7–8\u003c\/td\u003e\n\u003ctd\u003eTurn signal \/ position light\u003c\/td\u003e\n\u003ctd\u003eTurn signal not flashing, hyper-flash\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\u003e8-Pin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOEM Part Numbers\u003c\/td\u003e\n\u003ctd\u003e15326654 \/ 15326655\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing Material\u003c\/td\u003e\n\u003ctd\u003eNylon PA66\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eHeadlight assembly harness, multi-circuit lighting connector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Brands\u003c\/td\u003e\n\u003ctd\u003eChevrolet, GMC, Buick (GM platform)\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\u003eChevrolet Silverado 1500\/2500\/3500\u003c\/strong\u003e – Headlight assembly harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChevrolet Tahoe \/ Suburban \/ Avalanche\u003c\/strong\u003e – Front lighting harness connector\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGMC Sierra \/ Yukon \/ Envoy\u003c\/strong\u003e – Headlight and DRL harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuick Enclave \/ LaCrosse\u003c\/strong\u003e – Headlamp connector\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChevrolet TrailBlazer \/ Colorado\u003c\/strong\u003e – Shared GM headlight harness architecture\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: My Silverado DRL light is on but headlights work fine — is it the connector?\u003c\/strong\u003e\u003cbr\u003eA: Yes. DRL fault with functioning low\/high beams is a classic symptom of corrosion on the DRL circuit pins (5–6). The GM BCM logs \u003cstrong\u003eB2590\u003c\/strong\u003e (DRL relay circuit open) when Pin 5 or 6 loses contact. Inspect and clean the 8-pin headlight connector before replacing the DRL relay.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What fault codes does a failed GM headlight connector cause?\u003c\/strong\u003e\u003cbr\u003eA: Common DTCs include \u003cstrong\u003eB2590\/B2591\u003c\/strong\u003e (DRL circuit), \u003cstrong\u003eB0080\u003c\/strong\u003e (headlamp output fault), and turn signal-specific codes. The BCM may also log \u003cstrong\u003eU0073\u003c\/strong\u003e (CAN bus off) if multiple lighting circuits fail simultaneously from a single corroded connector.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I replace just the connector without replacing the full headlight harness?\u003c\/strong\u003e\u003cbr\u003eA: Yes. Cut the damaged connector from the existing harness, strip the wires, and crimp or solder the new connector terminals onto the existing wires. No full harness replacement required.\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":"Male","offer_id":47831703716085,"sku":"14:202642826#Male","price":23.75,"currency_code":"USD","in_stock":true},{"title":"Male 15CM","offer_id":47831703650549,"sku":"14:200004890#Male 15CM","price":58.75,"currency_code":"USD","in_stock":true},{"title":"Female","offer_id":47831703748853,"sku":"14:200004889#Female","price":23.75,"currency_code":"USD","in_stock":true},{"title":"Female 15CM","offer_id":47831703683317,"sku":"14:200004891#Female 15CM","price":58.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0732\/3494\/0149\/files\/Sf212688592b141afac6bb2397167f4344.webp?v=1773633582","url":"https:\/\/www.csldmcml.com\/products\/gm-8-pin-headlight-connector-oem-15326654-15326655","provider":"Cable Parts Online","version":"1.0","type":"link"}