Dorman 42539 Windshield Wiper Arm - Front Left or Front Right

Reliable Wiper Arm Replacement for Select GM Vehicles

The Dorman 42539 wiper arm is designed specifically for select Buick, Chevrolet, Oldsmobile, and Pontiac models. Engineered with durable materials and a precise fit, this wiper arm ensures consistent windshield clearing performance for vehicles like the Chevrolet Impala and Pontiac Grand Prix.

• Constructed from steel, plastic, and rubber for strength and flexibility
• Measures 28.625 inches in length for proper windshield coverage
• Black finish to match factory appearance
• Hook-type wiper end for secure blade attachment
• Includes integrated spray nozzle for washer fluid delivery
• Attachment via spine and flange nut for stable installation
• Specific fitment for Buick Century, Chevrolet Monte Carlo, Oldsmobile Intrigue, Pontiac Regal, and related models

Durable Materials and Precise Design

The Dorman 42539 wiper arm combines steel for structural integrity with plastic and rubber components to provide flexibility and weather resistance. Its 28.625-inch length is tailored to fit the windshield dimensions of compatible GM vehicles, ensuring optimal blade contact and effective water removal. The black color maintains a factory look, while the hook-type wiper end allows for easy blade replacement. Additionally, the included spray nozzle integrates washer fluid delivery directly through the arm, enhancing windshield cleaning efficiency.

Compatible Vehicles and Applications

This wiper arm is specifically designed for use on select Buick, Chevrolet, Oldsmobile, and Pontiac models, including:

• Buick Century
• Chevrolet Grand Prix
• Chevrolet Impala
• Oldsmobile Intrigue
• Chevrolet Monte Carlo
• Pontiac Regal

It is ideal for replacing worn or damaged wiper arms that cause streaking, skipping, or poor windshield contact.

Common Issues Addressed by This Wiper Arm

• Wiper arm bending or warping reducing blade pressure
• Corrosion or rust weakening the arm structure
• Loose or damaged attachment points causing blade misalignment
• Broken or missing spray nozzle affecting washer fluid delivery
• Incompatible or worn hook-type blade connections

Installation Notes and Tips

Installation requires removal of the old wiper arm by loosening the flange nut and detaching from the spine mount. Align the Dorman 42539 wiper arm carefully to the mounting point and secure it with the flange nut. Ensure the hook end is properly oriented to accept the wiper blade. No instruction manual is included, so consulting a vehicle-specific repair guide is recommended for proper installation procedures.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM specifications for fit and function. The 42539 wiper arm undergoes quality checks to ensure durability and reliable performance. While no specific warranty details are provided, Dorman typically offers limited warranties on their replacement components. Verify warranty terms with the product documentation or supplier.