The GM Rear Radar Blindspot Detection Module Terrain Traverse Regal Left Side OEM is a genuine GMC part designed for the GMC Terrain model. This module, with the manufacturer part number 84129137, is specifically meant to be placed on the left side of the vehicle. It is a crucial component for advanced driver assistance systems, providing a safer driving experience by detecting potential blind spots and aiding in parking assistance. This product is a reliable choice for customers looking to enhance their vehicle's safety features with a high-quality OEM part.