OE Quality
60-Day Returns

Delphi TC6557 Suspension Control Arm and Ball Joint Assembly - Front Left Lower
Delphi Suspension Control Arm and Ball Joint Assembly Overview
The Delphi TC6557 suspension control arm and ball joint assembly is designed for front left lower suspension applications on select Buick, Chevrolet, Oldsmobile, and Pontiac models. This pre-greased, stamped steel control arm offers a reliable replacement option for vehicles such as the Buick Skylark, Chevrolet Corsica, and Pontiac Grand Am.
- Pre-greased for immediate installation
- Includes rubber bushings for vibration dampening
- Stamped steel construction with black finish
- Press-in ball joint with threaded stud
- Standard replacement grade for light suspension use
- Includes mounting hardware for secure fitment
- Compatible with front left lower position
Detailed Product Description
The Delphi TC6557 control arm assembly features a durable stamped steel construction finished in black to resist corrosion. It comes pre-greased, eliminating the need for additional lubrication during installation. The assembly includes rubber bushings that help absorb road vibrations and improve ride quality. The ball joint is press-in mounted with a threaded stud type, ensuring a secure and precise fit. Designed for light suspension grade applications, this control arm is suitable for front left lower suspension on Buick Achieva, Chevrolet Alero, Oldsmobile models, and Pontiac Grand Am and Skylark vehicles.
Common Applications and Problem Resolution
- Replaces worn or damaged front left lower suspension control arms
- Addresses excessive suspension noise or clunking
- Corrects uneven tire wear caused by faulty bushings
- Improves steering stability and alignment issues
- Restores proper suspension geometry for safer handling
Installation Notes and Tips
Before installation, verify compatibility with your vehicle’s make and model, specifically Buick Achieva, Chevrolet Corsica, or Pontiac Grand Am. The control arm is not adjustable and comes pre-greased, so no additional lubrication is necessary. Use appropriate tools to press in the ball joint and torque mounting bolts to manufacturer specifications. Ensure the mounting holes, sized at 12.3 mm and 14.3 mm, align correctly for a secure fit.
Quality Assurance and Warranty
The Delphi TC6557 suspension control arm and ball joint assembly meets standard replacement grade requirements for light suspension use. Manufactured with quality materials and tested for durability, this part is backed by Delphi’s commitment to automotive component reliability. Please consult Delphi’s warranty policy for specific coverage details.
| Brand | Delphi |
| Part Number | TC6557 |
| Pre-Greased | Yes |
| Grease Fitting Included | No |
| Suspension Grade Type | Light |
| Bushings Included | Yes |
| Ball Joint Mounting Type | Press in |
| Ball Joint Stud Type | Threaded |
| Control Arm Construction | Stamped |
| Control Arm Material | Steel |
| Mounting Hardware Included | Yes |
| Mounting Hole Quantity | 2 |
| Adjustable | No |
| Greaseable | No |
| Control Arm Maximum Width | 379.1 |
| Control Arm Color | Black |
| Control Arm Maximum Length | 338.7 |
| Bushing Material | Rubber |
| Mounting Hole Diameter | 12.3 |
| Mounting Hole Diameter | 14.3 |
| Item Grade | Standard replacement |
| Position(s) | Front left lower |
This part fits 24 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2004 | Oldsmobile | Alero | Front Left Lower | |
| 2003 | Oldsmobile | Alero | Front Left Lower | |
| 2002 | Oldsmobile | Alero | Front Left Lower | |
| 2001 | Oldsmobile | Alero | Front Left Lower | |
| 2000 | Oldsmobile | Alero | Front Left Lower | |
| 1999 | Oldsmobile | Alero | Front Left Lower | |
| 1998 | Buick | Skylark | Front Left Lower | |
| 1998 | Oldsmobile | Achieva | Front Left Lower | |
| 1998 | Pontiac | Grand Am | Front Left Lower | |
| 1997 | Buick | Skylark | Front Left Lower | |
| 1997 | Oldsmobile | Achieva | Front Left Lower | |
| 1997 | Pontiac | Grand Am | Front Left Lower | |
| 1996 | Buick | Skylark | Front Left Lower | |
| 1996 | Chevrolet | Corsica | Front Left Lower | |
| 1996 | Oldsmobile | Achieva | Front Left Lower | |
| 1996 | Pontiac | Grand Am | Front Left Lower | |
| 1995 | Buick | Skylark | Front Left Lower | |
| 1995 | Chevrolet | Corsica | Front Left Lower | |
| 1995 | Oldsmobile | Achieva | Front Left Lower | |
| 1995 | Pontiac | Grand Am | Front Left Lower | |
| 1994 | Buick | Skylark | Front Left Lower | |
| 1994 | Chevrolet | Corsica | Front Left Lower | |
| 1994 | Oldsmobile | Achieva | Front Left Lower | |
| 1994 | Pontiac | Grand Am | Front Left Lower |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.