LM487 10383321 15764135 15231201 LED Flasher Relay - Fixes Hyperflash for Chevy GMC Cadillac Silverado Sierra Tahoe Yukon Escalade Hummer H2 (2003-2007 GMT800 Platform)

Precise GMT800 Platform Fit: Specifically engineered for 2003-2007 GM vehicles built on the GMT800/820/830/805/806 platform. This includes Silverado, Sierra, Tahoe, Suburban, Yukon, Escalade, Avalanche, and Hummer H2 models.Direct OEM Replacement: Replaces multiple original equipment part numbers, including 10383321, 15764135, 10383320, 15231201, LM487, and EFL-27. Always verify the part number on your original unit.Corrects LED Hyperflash: This electronic flasher relay is designed to resolve the rapid flashing (hyperflash) of turn signals and hazard lights that occurs after upgrading from standard halogen bulbs to LED bulbs, restoring the normal, legal flash rate. Simple Plug-and-Play Installation: Features the correct factory-style 10-pin connector. Installation typically involves locating the old flasher module (often under the dashboard) and swapping it directly without cutting or splicing any wires. LED Bulb Compatible Design: Engineered for use with aftermarket LED lighting. Its electronic design properly interacts with the lower current draw of LED bulbs, which is what causes hyperflash with standard thermal flasher relays.