{"product_id":"gtmoto-d3s-hid-bulbs-66340-42403-direct-replacement-for-gm-13587843-2-pack-6000k","title":"GTMOTO D3S HID Bulbs 66340 42403 — Direct Replacement for GM 13587843 (2 Pack) 6000K","description":"\u003ch2\u003eUpgrade your GM headlamps with GTMOTO D3S HID bulbs\u003c\/h2\u003e\n\u003cp\u003eGTMOTO D3S HID bulbs 66340 42403 are designed as a straightforward, two-bulb upgrade for select GM headlamp systems. Built to fit a range of Buick, Cadillac, Chevrolet, and GMC assemblies, these bulbs deliver a daylight white glow at 6000K and a brighter, more focused beam that can help highlight road edges, lane markings, and distant signage on night drives. The result is a more confident nighttime driving experience without altering the vehicle’s original wiring or ballast configuration.\u003c\/p\u003e\n\u003cp\u003eTwo enhancements stand out for real-world use: a stronger, more precise beam pattern and quicker light readiness. The bulbs are built to respond quickly when you switch on the headlights, reaching peak brightness with minimal warm-up. This instant-on feel can be helpful when maneuvering in dim neighborhoods or transitioning from street lighting to darker highways.\u003c\/p\u003e\n\u003ch3\u003eKey benefits you might notice\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eUp to 1.5x brightness versus older stock bulbs, helping with long-range visibility.\u003c\/li\u003e\n  \u003cli\u003e6000K daylight white light for a crisper, more natural color impression on dark roads.\u003c\/li\u003e\n  \u003cli\u003eFast ignition and a short warm-up period to reach top brightness.\u003c\/li\u003e\n  \u003cli\u003eLong-lasting anti-UV quartz glass designed to keep output stable over time.\u003c\/li\u003e\n  \u003cli\u003eDirect replacement format with a 2-pack, intended for a simple, tool-free upgrade.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eImportant compatibility notes: these bulbs are designed for 35W HID systems with D3S\/D3SC1 ballast configurations and a 42VAC ballast environment. They are not intended for traditional 12V halogen systems or non-HID setups. If your vehicle uses a different color temperature era or ballast type, please verify compatibility before purchasing.\u003c\/p\u003e\n\u003ch3\u003eInstallation and vehicle compatibility\u003c\/h3\u003e\n\u003cp\u003eDesigned for a quick upgrade, installation is described as around 10 minutes with no modification required. The two bulbs come in a protective package to ensure safe transit and handling. The lineup covers a broad set of GM vehicles and headlamp assemblies, including models from Buick, Cadillac, Chevrolet, and GMC that use D3S style HID headlamps or AFs-style adaptive bi xenon front lamps.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with select Buick, Cadillac, Chevrolet, and GMC headlamp assemblies that use D3S type HID bulbs.\u003c\/li\u003e\n  \u003cli\u003eIntended for adaptive bi xenon and premium bi-xenon front lamp setups where D3S is specified.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIn short, GTMOTO D3S bulbs offer a practical, high-visibility upgrade option for drivers looking to refresh aging HID lighting with a modern, daylight-like appearance. While results can vary by vehicle condition and ballast, many users report clearer nighttime visibility and a more confident driving experience after installation. Always ensure ballast and assembly compatibility before purchasing to maximize performance.\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: What color temperature and brightness can I expect from GTMOTO D3S bulbs?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: They emit a 6000K daylight white beam with enhanced brightness for clearer night visibility.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are these bulbs a direct GM headlamp replacement and how long do they last?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, they fit as a 2-pack direct replacement for D3S headlamps on many GM models and can last over 3000 hours.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"GTMOTO","offers":[{"title":"Default Title","offer_id":42474779967573,"sku":"B0CPVNF3TW","price":67.33,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/3270\/4597\/files\/gtmoto-d3s-bulbs-66340-42403-front-view.jpg?v=1778253510","url":"https:\/\/plentytorque.co.uk\/products\/gtmoto-d3s-hid-bulbs-66340-42403-direct-replacement-for-gm-13587843-2-pack-6000k","provider":"PlentyTorque","version":"1.0","type":"link"}