Replacement Part Number: Replace 12135037 Multi-Function Relay, Please confirm the model match before placing your order.Broad Compatibility: Compatible with popular brands such as Chevrolet, Buick, GMC, and Cadillac, ensuring reliable performance across various models.Efficient AGM Battery Charging: The 12135037 Multi-Function Diode provides the essential power output needed to effectively charge AGM batteries, ensuring optimal performance and reliability during upgrades.Comprehensive Solution: Each package includes four diodes, offering a complete resolution for common dashboard battery indicator light issues. Simply flip the diodes 180° during installation to effectively eliminate the warning light.Simple Installation: This product is designed for easy, plug-and-play installation. Simply remove the faulty diode and insert the new one—step-by-step instructions are included for a hassle-free setup.