Dorman 603-177 Washer Fluid Reservoir - Front

Overview of Dorman Washer Fluid Reservoir 603-177

The Dorman 603-177 washer fluid reservoir is designed for reliable performance in select Cadillac, Chevrolet, and GMC trucks and SUVs. Constructed from durable plastic, this white reservoir provides a direct replacement solution for vehicles including the Chevrolet Silverado and GMC Sierra series.

• Durable plastic construction for long-lasting use
• White color matches original equipment appearance
• Includes washer fluid reservoir only; no mounting hardware or brackets included
• Compatible with multiple Chevrolet, GMC, and Cadillac models
• OEM-quality fitment ensures proper installation and function

Product Details and Specifications

The Dorman 603-177 washer fluid reservoir is made from sturdy plastic material designed to withstand typical under-hood conditions. Its white finish aligns with factory standards, maintaining the original look of your vehicle’s engine bay. This part does not include mounting hardware, brackets, or a reservoir cap, so these components must be reused from the original assembly or sourced separately. The reservoir is engineered to fit a range of full-size trucks and SUVs, including the Chevrolet Silverado 1500, 2500, and 3500 HD models, GMC Sierra 1500, 2500 HD, and 3500 HD, as well as Cadillac Escalade EXT and Chevrolet Avalanche.

Compatible Vehicles and Applications

This washer fluid reservoir is compatible with the following makes and models:

• Cadillac Escalade EXT
• Chevrolet Avalanche
• Chevrolet Cheyenne
• Chevrolet Silverado 1500, 2500, 2500 HD, 3500, 3500 HD
• GMC Sierra 1500, 2500 HD, 3500 HD

Common Issues Addressed by This Washer Fluid Reservoir

• Cracked or leaking original washer fluid reservoir
• Contamination or damage causing fluid loss
• Failure to hold washer fluid leading to windshield cleaning issues
• Deformation from heat or impact under the hood
• Replacement due to corrosion or wear over time

Installation Notes and Tips

Installation of the Dorman 603-177 washer fluid reservoir requires removal of the old reservoir and transfer or replacement of mounting hardware and reservoir cap, as these are not included. Ensure all fluid lines are properly connected and free of leaks after installation. It is recommended to inspect the washer pump and hoses during replacement to confirm full system functionality.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. While this washer fluid reservoir does not include a specific warranty statement, Dorman typically offers limited warranties on their replacement parts. Verify warranty details with the product documentation or supplier at the time of purchase.