Dorman 603-138 Engine Coolant Reservoir - Front

Reliable Engine Coolant Reservoir for Buick, Chevrolet, GMC, and Saturn

The Dorman 603-138 engine coolant reservoir is designed to provide a durable and precise fit for select Buick, Chevrolet, GMC, and Saturn models. Engineered with quality plastic material, this reservoir ensures proper coolant storage and system performance for vehicles like the Acadia, Enclave, and Traverse.

• Constructed from durable plastic with black and clear coloring for easy coolant level monitoring
• Dimensions: 10.007 inches in length and 9.211 inches in height
• Includes mounting brackets and a flip-top cap for secure installation and maintenance
• Non-pressurized design with a 1-liter capacity suitable for specified GM SUVs
• Comes with one engine coolant reservoir, one cap, and one hose for a complete replacement
• Features two mounting holes for stable attachment

Detailed Product Description

The Dorman 603-138 engine coolant reservoir is specifically designed to fit Buick Acadia, Acadia Limited, Chevrolet Traverse, GMC Acadia, and Saturn Outlook models. Made from high-quality plastic, the reservoir combines durability with functionality, featuring a black and clear design that allows for quick visual checks of coolant levels. Its irregular shape is tailored to fit the engine bay layout of these vehicles, ensuring a secure and space-efficient installation.

This reservoir includes mounting brackets and two mounting holes, providing a stable and reliable fit. The flip-top cap is included for easy access during coolant refills and maintenance, while the non-pressurized design aligns with the cooling system requirements of the compatible models. With a 1-liter capacity, it supports proper coolant circulation and helps prevent overheating issues.

Common Applications and Problem Solving

• Replaces cracked or leaking coolant reservoirs in Buick Acadia and GMC Acadia models
• Addresses coolant overflow or low coolant level warnings in Chevrolet Traverse vehicles
• Resolves issues related to damaged or missing reservoir caps in Saturn Outlook
• Prevents engine overheating caused by coolant loss or reservoir failure
• Restores proper coolant containment and system pressure balance

Installation Notes and Tips

• Ensure the vehicle is cool before removing the old reservoir to avoid burns
• Use the included mounting brackets and two mounting holes for secure installation
• Check the flip-top cap for proper sealing after installation to prevent leaks
• Refill the reservoir with the recommended coolant type for your vehicle
• Inspect hoses and connections for wear or damage during replacement

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards, providing reliable performance and fitment. The 603-138 engine coolant reservoir undergoes rigorous quality control to ensure durability and compatibility with Buick, Chevrolet, GMC, and Saturn vehicles. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in material and workmanship.