HomeSteering > Power Steering Hoses, Pumps, and Related ComponentsDorman 300-142 Power Steering Pump Pulley
Part #: 300-142

Dorman 300-142 Power Steering Pump Pulley

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⚙️ 21 vehicles fit this part
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Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Cadillac, STS, CTS, and SRX
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Overview of Dorman Power Steering Pump Pulley 300-142

The Dorman 300-142 power steering pump pulley is designed for reliable performance in select Cadillac models. Engineered from durable steel with a black finish, this pulley is compatible with Cadillac CTS, SRX, and STS vehicles, ensuring proper fit and function.

  • Constructed from sturdy steel material for durability
  • Black color finish for corrosion resistance
  • 6-groove design compatible with serpentine belts
  • Outside diameter measures 5.35 inches
  • Single mounting hole for secure attachment
  • Standard replacement grade for dependable operation
  • Includes pulley only; mounting hardware and installation instructions not included
  • Pulley bore diameter of 0.6622 inches

Detailed Product Description

The Dorman 300-142 power steering pump pulley is a direct replacement part engineered to meet the specifications of original equipment. Its steel construction provides strength and resistance to wear, while the black finish helps protect against rust and corrosion. The 6-groove design is specifically made for serpentine belt systems, common in Cadillac CTS, SRX, and STS models. With an outside diameter of 5.35 inches and a pulley bore of 0.6622 inches, this pulley ensures proper belt alignment and tension for efficient power steering pump operation. The single mounting hole allows for straightforward installation on compatible power steering pumps.

Compatible Vehicles and Applications

  • Cadillac CTS power steering pump pulley replacement
  • Cadillac SRX compatible power steering pump pulley
  • Cadillac STS power steering pump pulley fitment

Common Issues Addressed by This Pulley

  • Worn or damaged pulley causing belt slippage
  • Corroded pulley affecting power steering pump performance
  • Misaligned pulley leading to serpentine belt wear
  • Noise or vibration from faulty pulley operation
  • Replacement of broken or cracked pulley components

Installation Notes and Tips

Installation of the Dorman 300-142 power steering pump pulley requires removal of the old pulley and proper alignment of the new one on the power steering pump shaft. Since mounting hardware and installation instructions are not included, it is recommended to have appropriate tools and mechanical knowledge before attempting installation. Ensure the serpentine belt is properly routed over the 6-groove pulley to maintain correct tension and avoid premature belt wear.

Quality Assurance and Warranty

This Dorman power steering pump pulley is manufactured to meet standard replacement quality requirements. While mounting hardware and instructions are not provided, the part is designed to offer reliable service life when installed correctly. Warranty coverage details should be confirmed through the original purchase source or Dorman's official warranty policy.

BrandDorman
Part Number300-142
Belt TypeSerpentine
ColorBlack
Groove Quantity6
Installation Instructions IncludedNo
Item GradeStandard Replacement
MaterialSteel
Mounting Hardware IncludedNo
Mounting Hole Quantity1
Outside Diameter5.35
Package ContentsPulley
Pulley Bore.6622

This part fits 21 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2011CadillacSTSN/A
2010CadillacSTS3.6LV6N/A
2009CadillacCTS3.6LV6N/A
2009CadillacSRX3.6LV6N/A
2009CadillacSTS3.6LV6N/A
2008CadillacCTSN/A
2008CadillacSRX3.6LV6N/A
2008CadillacSTS3.6LV6N/A
2007CadillacCTS2.8LV6N/A
2007CadillacCTS3.6LV6N/A
2007CadillacSRX3.6LV6N/A
2007CadillacSTS3.6LV6N/A
2006CadillacCTS2.8LV6N/A
2006CadillacCTS3.6LV6N/A
2006CadillacSRX3.6LV6N/A
2006CadillacSTS3.6LV6N/A
2005CadillacCTS3.6LV6N/A
2005CadillacSRX3.6LV6N/A
2005CadillacSTS3.6LV6N/A
2004CadillacCTS3.6LV6N/A
2004CadillacSRX3.6LV6N/A

* 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:

12574521

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.