ACDelco 20859338 Front Lower Coil Spring Insulator GM OE Replacement

The ACDelco 20859338 is a Front Lower Coil Spring Insulator (also referred to as a front spring lower insulator or coil spring cushion) designed as a direct OEM replacement for GM vehicles. This insulator seats between the coil spring and the lower spring perch, absorbing road vibration and preventing metal-to-metal contact to reduce noise and extend spring life.

Key Features:

• OEM Quality: Genuine ACDelco GM part — designed, engineered, and tested to GM's rigorous standards
• Material: Durable black polyurethane elastomer construction for long-lasting resilience and vibration dampening
• Attachment Style: Slip-on design for straightforward installation onto the lower coil spring perch
• Shape: Circular profile engineered to match OEM specifications precisely
• Function: Isolates the coil spring from the suspension cradle to reduce noise, vibration, and harshness (NVH)
• Part Number: 20859338 (also referenced as GM P/N 20859338)

This ACDelco coil spring insulator is sold individually and is a component of the front suspension system. It is a genuine OEM replacement part backed by General Motors for reliable fit, form, and function.