Dorman 902-5601CD Engine Coolant Reservoir Cap

Reliable Engine Coolant Reservoir Cap for GM Vehicles

The Dorman 902-5601CD engine coolant reservoir cap is designed to maintain proper pressure in your vehicle's cooling system. Engineered for select Buick, Cadillac, Chevrolet, GMC, Hummer, Oldsmobile, Pontiac, and Saturn models, this twist-on cap ensures a secure seal to help prevent coolant loss and overheating.

• Durable black plastic construction
• 63.5 mm diameter for precise fitment
• Maximum pressure rating of 15 psi for optimal system performance
• Twist-on attachment type for easy installation
• Pressurized design without vent or pressure release lever
• Compact size: 1.5 inches length and 2.5 inches width
• Includes one coolant tank cap per package

Product Details and Specifications

The Dorman 902-5601CD coolant reservoir cap is made from high-quality plastic, providing resistance to heat and corrosion commonly found in engine compartments. Its 63.5 mm diameter matches OEM specifications for a secure fit on compatible coolant tanks. Rated for a maximum pressure of 15 psi, this cap helps maintain the correct pressure level within the cooling system, which is critical for preventing coolant boiling and ensuring efficient engine temperature regulation. The twist-on design allows for straightforward installation and removal without the need for additional tools. This cap is pressurized but does not include a vent or pressure release lever, aligning with the original equipment design for the specified GM vehicles.

Compatible Vehicles and Applications

This engine coolant reservoir cap is compatible with a wide range of General Motors vehicles, including but not limited to:

• Buick Alero, LaCrosse, and Lucerne
• Cadillac Escalade, SRX, and CTS
• Chevrolet Avalanche 1500/2500, Cobalt, Malibu, Silverado 1500/2500/3500, Suburban 1500/2500, Tahoe, Traverse
• GMC Sierra 1500/2500/3500, Terrain, Yukon, Yukon XL 1500/2500
• Hummer H2
• Oldsmobile Alero, Cutlass
• Pontiac G6, Grand Am, Solstice
• Saturn Aura, Sky, Vue

Use this cap to replace worn or damaged coolant reservoir caps on these models to maintain proper cooling system function.

Common Issues Addressed by This Coolant Reservoir Cap

• Coolant leaks caused by cracked or damaged caps
• Loss of system pressure leading to engine overheating
• Coolant contamination from improper sealing
• Difficulty maintaining coolant levels due to faulty cap seal
• Preventing air entry into the cooling system

Installation Notes and Tips

Installation of the Dorman 902-5601CD coolant reservoir cap is straightforward. Ensure the engine is cool before removing the old cap to avoid injury from hot coolant or steam. Align the cap properly on the reservoir opening and twist clockwise until securely tightened. Do not overtighten, as this may damage the cap or reservoir neck. Regular inspection of the cap and cooling system is recommended to maintain optimal performance.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 902-5601CD coolant reservoir cap undergoes quality checks to ensure durability and reliability in demanding automotive environments. While specific warranty details are not provided, Dorman typically offers limited warranties on their replacement parts. Consult product documentation or the manufacturer for exact warranty terms.