96399589 GM Plastic plug

What is this part?

The GM plastic plug 96399589 is a genuine OEM body or trim component designed to seal or close openings in vehicle panels, housings, or assemblies.

What does it do?

This OEM plastic plug blocks unused holes or access points, helping prevent water, dust, dirt, noise, and fumes from entering vehicle interiors or structural cavities. It is commonly used in body panels, floor pans, engine bays, door trims, interior panels, and underbody areas. A genuine GM plastic plug is manufactured to factory specifications, ensuring correct diameter, secure retention, and resistance to temperature changes and vibration.

When to replace

The GM plastic plug 96399589 should be replaced if it is missing, cracked, deformed, brittle, or no longer fits securely. A damaged or missing plug can lead to water ingress, corrosion, increased noise, or cosmetic issues. Installing a genuine OEM plug restores proper sealing and protection.

Compatibility

The genuine GM plastic plug 96399589 is compatible with selected GM vehicles. Compatibility depends on installation location, hole size, panel thickness, and model year. Always verify the part number 96399589 before purchase to ensure correct fitment.

Installation: DIY or service?

Installation of the genuine OEM GM plastic plug 96399589 is generally suitable for DIY replacement. Ensure the plug is fully seated for a tight fit. No special tools or programming are required.