Delphi TL489 Steering Idler Arm

OE-Style Steering Idler Arm for Classic GM Trucks

Delphi TL489 is a standard replacement steering idler arm built for classic Chevrolet and GMC truck applications. It is pre-greased, greaseable, and includes a grease fitting for serviceable steering maintenance on vehicles such as the Chevrolet C10, GMC C2500, and Chevrolet K5 Blazer.

Key Features

• Standard replacement steering idler arm for OE-style service
• Pre-greased for initial installation readiness
• Greaseable design with grease fitting included
• Stud-style arm attachment type
• Length: 5.39 in.
• Delphi part number TL489

Application Details

Compatible with a wide range of GM rear-wheel-drive steering applications from 1967-1982, including Chevrolet C10, C20, C30, G10, G20, G30, K5 Blazer, P10, P20, and P30, plus GMC C2500, C3500, G1500, G2500, G3500, Jimmy, P2500, and P3500 models. This part cross-references Dorman OE Solutions 535-712 for the same application.

Delphi applies OE-focused dimensional and material analysis to help maintain proper fit and steering geometry. The part is tested for extreme temperature exposure and salt-spray resistance to reflect demanding underbody conditions common in Chevrolet and GMC steering systems.

What This Part Helps Address

• Excess steering play caused by a worn idler arm
• Loose or inconsistent steering response
• Uneven steering linkage movement
• Grease loss or dry pivot points in serviceable steering systems
• Replacement needs on aging Chevrolet C10 and GMC truck steering components

Installation Notes

Verify vehicle year, make, model, and steering linkage configuration before installation. Inspect related steering components such as the center link, pitman arm, and tie rod ends for wear, since a worn linkage can affect steering feel after replacement. Torque fasteners to the vehicle manufacturer’s specifications and lubricate through the grease fitting during routine service.

Quality Assurance

Delphi uses OE-based engineering and validation methods for its steering portfolio, including dimensional and material analysis for fit consistency. The part is evaluated under temperature extremes below -40 degrees C and above 120 degrees C, and exposed to 720 hours of salt spray to assess durability in harsh operating conditions.