GMC AT4 Trailer Hitch Cover

AT4 Hitch Plug – Tool-Free, Locking Insert (3D Print Design)

Ditch the traditional hitch pin setup and switch to a cleaner, smarter solution. This hitch plug is designed to press directly into your receiver and stay put using an integrated locking feature—no loose parts, no extra steps.

Instead of just covering your hitch, this piece adds a bold AT4-inspired detail that blends right in with your truck’s aggressive styling while keeping your receiver protected from the elements.

What Makes It Different:

• Integrated Locking Tabs: The built-in retention system grips the inside of your hitch, eliminating the need for pins or clips.
• Clean, Flush Look: Designed to sit neatly within the receiver for a more refined, factory-style appearance.
• Weather-Ready Design: Holds up against rain, dust, and road grime when printed with the right material.
• Standard Fitment: Compatible with typical 2” hitch openings for easy, reliable use.
• Self-Clearing Openings: Allows water and debris to pass through instead of collecting inside.

Recommended Print Approach:

This model is intended for durability and outdoor exposure, so material choice matters.

• Use PETG for a balance of strength, flexibility, and UV resistance
• 0.2 mm layer height for a good mix of detail and speed
• Around 20% infill to maintain strength without overusing material
• Increase wall count (4+) to reinforce the snap features
• Add supports where needed, especially around the locking sections
• Print with the front face oriented upward for best visual results

How It Works:

Push the insert straight into your hitch until it seats firmly. The internal tabs will hold it in place. When you need to remove it, apply steady pressure and pull it free.