Delphi TC1603 Suspension Ball Joint - Front or Front Lower

OE-Style Front Lower Ball Joint

Delphi TC1603 is a standard replacement suspension ball joint built for front and front lower applications on select Cadillac, Chevrolet, and GMC vehicles. It combines OE-focused dimensional control with greaseable serviceability, making it a practical choice for restoring steering response and suspension stability.

• OE-style suspension ball joint for front lower applications
• Press-in mounting type with tapered threaded stud
• Greaseable design with grease fitting included
• Dust boot included to help protect the joint from contamination
• Castle nut, cotter pin, cotter pin hole, and mounting hardware included
• Ball material: Alloy Steel SAE 5140; housing material: Carbon Steel SAE 1040
• Standard replacement grade for direct-fit service work

Fitment and Application Details

Compatible with 2010-2011 Cadillac DTS, front with heavy duty brakes; 2006-2009 Cadillac DTS, front lower; 1998-2005 Cadillac DeVille, front lower; 1997 Cadillac DeVille, front heavy duty version; 1988-1992 Chevrolet C1500, front lower; 1992 Chevrolet C1500 Suburban, front lower; 1988-1992 Chevrolet C2500, front lower; 1992 Chevrolet C2500 Suburban, front lower; 1988-1992 Chevrolet C3500, front lower; 1988-1992 GMC C1500, front lower; 1992 GMC C1500 Suburban, front lower; 1988-1992 GMC C2500, front lower; 1992 GMC C2500 Suburban, front lower; and 1988-1992 GMC C3500, front lower.

This part cross-references MOOG Chassis Products K6445 and QuickSteer K6293 for the same application.

What This Ball Joint Helps Address

• Front-end looseness or play from a worn lower ball joint
• Clunking or popping noises during steering or suspension movement
• Uneven tire wear caused by suspension joint wear
• Imprecise steering feel on Cadillac DTS, Cadillac DeVille, Chevrolet C1500, and GMC C-series trucks
• Restoration work on older GM front suspension systems

Installation Notes

Press-in installation requires proper suspension service tools and attention to the vehicle-specific application. Verify the correct position before installation, and confirm stud taper, thread size, and mounting depth against the original part. Because this Delphi ball joint is greaseable, service the fitting after installation according to your maintenance schedule.

Quality Assurance

Delphi applies OE-level engineering and dimensional analysis to its aftermarket steering and suspension portfolio. This ball joint is tested for extreme temperature exposure and salt-spray resistance to support durability in demanding road conditions. Part number TC1603 is built as a standard replacement for direct service use.