Dorman 300-128 Power Steering Pump Pulley

Durable Power Steering Pump Pulley for Select GM Vehicles

The Dorman 300-128 power steering pump pulley is engineered to provide reliable performance for your Buick, Cadillac, Oldsmobile, or Pontiac vehicle. Designed with precision, this steel pulley ensures proper belt alignment and smooth operation of the power steering system.

• Constructed from durable steel with a black finish for corrosion resistance
• Features 6 grooves compatible with serpentine belts
• 6.5-inch outside diameter for accurate fitment
• Single mounting hole design for secure attachment
• Standard replacement grade for dependable service
• Compatible with power steering pumps on Buick Aurora, Cadillac DeVille, DTS, Seville, Oldsmobile Aurora, Pontiac Bonneville, and Lucerne

Product Details and Specifications

The Dorman 300-128 power steering pump pulley is crafted from steel to withstand the stresses of power steering operation. Its black finish helps resist rust and wear over time. The pulley features six grooves designed specifically for serpentine belts, ensuring proper belt tracking and tension. With an outside diameter of 6.5 inches and a pulley bore size of 0.7472 inches, this pulley matches OEM specifications for a precise fit. The single mounting hole allows for straightforward installation on compatible power steering pumps. This part is a standard replacement grade component, providing a reliable option for restoring your vehicle's steering system.

Compatible Vehicles and Applications

This power steering pump pulley is compatible with a range of General Motors vehicles, including:

• Buick Aurora and Lucerne
• Cadillac DeVille, DTS, and Seville
• Oldsmobile Aurora
• Pontiac Bonneville

Use the Dorman 300-128 pulley when replacing worn or damaged pulleys on these models to maintain proper power steering function.

Common Issues Addressed by This Pulley

• Worn or damaged pulley grooves causing belt slippage
• Corroded or rusted pulley surfaces affecting belt alignment
• Excessive pulley wobble leading to steering noise or vibration
• Broken or cracked pulley compromising power steering pump operation
• Incorrect pulley size causing serpentine belt misalignment

Installation Notes and Tips

The Dorman 300-128 power steering pump pulley does not include mounting hardware or installation instructions. It is recommended to use appropriate tools and follow vehicle-specific service manuals for removal and installation. Ensure the serpentine belt is properly routed and tensioned after pulley replacement. Inspect the power steering pump and belt for wear during installation to prevent future issues.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards. The 300-128 power steering pump pulley is a standard replacement grade component designed for durability and reliable performance. While specific warranty details may vary, Dorman typically offers limited warranties covering defects in material and workmanship. Consult product documentation or Dorman directly for warranty information related to this part.