ACDelco 13322645 Rear Coil Spring Insulator GM Genuine Parts

The ACDelco 13322645 is a genuine GM rear coil spring insulator, also known as a coil spring isolator or coil spring cushion, designed as a direct OE replacement for the rear suspension system. This slip-on insulator seats between the coil spring and its mounting perch, dampening road noise, vibrations, and impacts before they transfer into the vehicle chassis.

Key Features:

• Material: Polyurethane elastomer construction for long-lasting durability and resistance to compression set
• Color: Black
• Shape: C-channel / circular profile for secure coil spring seating
• Inside Diameter: 1.42 inches (36 mm)
• Outside Diameter: Approximately 4.21 inches (107 mm)
• Length: 1.14 inches (29 mm)
• Height: 0.8 inches
• Attachment Type: Slip-on — no mounting hardware required
• Meets or Exceeds OEM Specifications: Yes
• Position: Rear
• Sold individually

As a GM Genuine Parts component, the ACDelco 13322645 is designed, engineered, and tested to rigorous GM standards, ensuring proper fit, form, and function with compatible GM vehicles. This part was formerly marketed under the ACDelco GM Original Equipment (OE) designation. Replacing worn or cracked coil spring insulators restores suspension noise isolation and helps protect the coil spring and surrounding suspension components from premature wear.