ACDelco 55573646 Multi-Purpose Threaded Differential Drain Fill Plug

The ACDelco 55573646 is a genuine GM multi-purpose threaded plug designed for use as a differential drain or fill plug on select General Motors vehicles. This OE-quality component is engineered to meet the exact specifications required for proper sealing and function in rear differential applications.

Key Features:

• Genuine GM part designed, engineered, and tested to rigorous OE standards
• Functions as both drain and fill plug for differential assemblies
• Compatible with 8.625, 9.50, and 9.76 ring gear differentials
• Precision threaded design ensures proper fit and seal
• Validated by General Motors for GM vehicles including Chevrolet, GMC, Buick, and Cadillac
• Replaces superseded part number 13297321

This threaded plug is included with complete axle and differential assemblies and provides reliable sealing for differential fluid. As a GM Genuine Part backed by General Motors, it delivers the quality and durability expected from original equipment components.