42400124 GM Window regulator

What is this part?

The GM window regulator mechanism 42400124 is a genuine OEM body component designed to control the movement of the vehicle window glass.

What does it do?

This OEM window regulator mechanism raises and lowers the window glass smoothly within the door frame. Depending on the configuration, it may operate manually or be driven by an electric motor. A genuine GM window regulator is manufactured to factory specifications, ensuring correct cable or scissor operation, stable glass positioning, and reliable performance. Proper window regulator function is essential for passenger comfort, convenience, and window sealing.

When to replace

The GM window regulator mechanism 42400124 should be replaced if the window moves unevenly, becomes stuck, drops inside the door, or produces grinding or clicking noises. Broken cables, worn gears, or bent arms may cause malfunction. Installing a genuine OEM window regulator helps restore smooth and reliable window operation.

Compatibility

The genuine GM window regulator mechanism 42400124 is compatible with selected GM vehicles. This OEM component is engineered for precise fitment within the original door structure. Compatibility may vary depending on door position (front or rear), left or right side, manual or power window configuration, and model year. Please verify the part number 42400124 before purchase.

Installation: DIY or service?

Installation of this genuine OEM GM window regulator mechanism 42400124 involves removing the door panel and securing the glass. Professional installation is recommended to ensure proper alignment and safe window operation.