Delphi TD4664W Coil Spring Insulator - Rear, Rear Lower or Rear Upper

Delphi TD4664W Rear Coil Spring Insulator

Delphi TD4664W is a standard replacement coil spring insulator for rear suspension applications. It is built for vehicles that need OE-style dimensional accuracy and material consistency at the spring seat, helping maintain proper spring isolation in the rear suspension.

Compatible with select Cadillac Escalade, Chevrolet Tahoe, GMC Yukon, and related GM SUVs, this rear coil spring insulator is a direct-fit service part for common rear upper, rear lower, and rear positions depending on the vehicle application.

Key Features

• Standard replacement coil spring insulator for rear suspension service
• OE-focused dimensional and material analysis for fit consistency
• Tested for temperature extremes below -40 degrees C and above 120 degrees C
• Exposed to 720 hours of salt spray testing for corrosion resistance validation
• Fits rear, rear lower, and rear upper positions depending on vehicle application
• Delphi TD4664W cross-references OE part number 15765071 for the same application

Detailed Description

Delphi TD4664W is engineered as a rear coil spring insulator for suspension repair on a wide range of GM trucks and SUVs. It is designed around OE specifications so the insulator seats correctly between the coil spring and suspension mounting point, helping preserve the intended spring interface on vehicles such as the 2000-2006 Chevrolet Tahoe, 2000-2006 GMC Yukon, 2007-2014 Cadillac Escalade, and 2007-2014 Chevrolet Suburban 1500. This part number is also used on applications including the Chevrolet Trailblazer, GMC Envoy, Hummer H2, and Buick Rainier in the rear upper or rear positions where specified.

Delphi TD4664W is a practical choice when replacing a worn rear coil spring insulator on GM suspension systems that rely on precise OE-style fitment. The part number TD4664W appears in service listings for multiple rear suspension positions, so the vehicle application should be checked carefully before ordering.

What It Helps Address

• Noise from a worn or deteriorated rear spring seat
• Metal-to-metal contact at the coil spring mounting point
• Improper spring isolation in the rear suspension
• Fitment issues caused by aged or compressed insulators
• Suspension service needs on Cadillac Escalade, Chevrolet Tahoe, and GMC Yukon platforms

Installation Notes and Tips

Verify the exact rear position for your vehicle before installation, since this part is listed for rear, rear lower, and rear upper applications. Match the part to the vehicle’s year, make, model, and suspension position in the application data, especially on GM SUVs and trucks with multiple rear spring seat configurations. Inspect the surrounding spring seat and mounting surfaces for wear before installing the new insulator.

Quality Assurance

Delphi applies OE-focused testing and dimensional analysis to support consistent aftermarket fitment. This part is validated through extreme temperature exposure and extended salt spray testing to reflect demanding underbody conditions.