Dorman 603-008 Engine Coolant Reservoir
Engine Coolant Reservoir for Silverado and Sierra HD
This Dorman engine coolant reservoir is a direct replacement for select heavy-duty GM trucks, including 2011-2016 Chevrolet Silverado 2500 HD and Silverado 3500 HD, plus 2011-2016 GMC Sierra 2500 HD and Sierra 3500 HD. Built from plastic to handle underhood heat and vibration, it matches the original fit and function for service replacement work.
- Direct replacement engine coolant reservoir for OE-style fit and function
- Plastic construction for underhood durability
- Natural finish with irregular shape to match the original layout
- Twist cap design with a 20 pressure rating
- Level sensor included for applications that use reservoir monitoring
- Cap included for a complete replacement assembly
- Fits 2011-2016 Chevrolet Silverado 2500 HD and Silverado 3500 HD
- Fits 2011-2016 GMC Sierra 2500 HD and Sierra 3500 HD
Detailed Product Overview
Dorman 603-008 is engineered as a replacement coolant overflow tank for heavy-duty Chevrolet Silverado and GMC Sierra trucks. The reservoir is shaped to match the original mounting layout, with two mounting holes and no separate mounting brackets or hardware included. Its 1.7 L capacity, pressurized design, and twist-style cap support proper coolant expansion and recovery in the cooling system. This part cross-references OE numbers such as 13502509 and 22769155 for the same application. For buyers searching by vehicle, this is a practical choice for Silverado 2500 HD coolant reservoir replacement, Silverado 3500 HD coolant tank service, and Sierra HD coolant recovery tank repair. The Dorman 603-008 part number is also useful when matching an OE-style replacement by catalog reference.
Common Problems This Part Addresses
- Cracked or leaking coolant reservoir housing
- Broken cap or pressure-retention issues
- Low coolant level warnings tied to reservoir sensor faults
- Heat-related plastic fatigue from long-term engine bay exposure
- Fitment problems after replacing a damaged original tank
Installation Notes and Tips
Verify the reservoir shape, cap style, sensor provision, and mounting-hole layout before installation. Transfer any required hoses and electrical connections from the original setup as needed, and inspect the surrounding cooling system for leaks, hardened hoses, or damaged clamps before refilling. Confirm the cooling system is properly bled after installation to help maintain stable coolant circulation.
Quality Assurance
Dorman manufactures this replacement coolant reservoir from quality materials and builds it to match original fit and function for the listed Chevrolet Silverado HD and GMC Sierra HD applications. Part number 603-008 is intended for direct replacement service on the confirmed vehicle fitments.
Original: $210.37
-65%$210.37
$73.63Dorman 603-008 Engine Coolant Reservoir
Engine Coolant Reservoir for Silverado and Sierra HD
This Dorman engine coolant reservoir is a direct replacement for select heavy-duty GM trucks, including 2011-2016 Chevrolet Silverado 2500 HD and Silverado 3500 HD, plus 2011-2016 GMC Sierra 2500 HD and Sierra 3500 HD. Built from plastic to handle underhood heat and vibration, it matches the original fit and function for service replacement work.
- Direct replacement engine coolant reservoir for OE-style fit and function
- Plastic construction for underhood durability
- Natural finish with irregular shape to match the original layout
- Twist cap design with a 20 pressure rating
- Level sensor included for applications that use reservoir monitoring
- Cap included for a complete replacement assembly
- Fits 2011-2016 Chevrolet Silverado 2500 HD and Silverado 3500 HD
- Fits 2011-2016 GMC Sierra 2500 HD and Sierra 3500 HD
Detailed Product Overview
Dorman 603-008 is engineered as a replacement coolant overflow tank for heavy-duty Chevrolet Silverado and GMC Sierra trucks. The reservoir is shaped to match the original mounting layout, with two mounting holes and no separate mounting brackets or hardware included. Its 1.7 L capacity, pressurized design, and twist-style cap support proper coolant expansion and recovery in the cooling system. This part cross-references OE numbers such as 13502509 and 22769155 for the same application. For buyers searching by vehicle, this is a practical choice for Silverado 2500 HD coolant reservoir replacement, Silverado 3500 HD coolant tank service, and Sierra HD coolant recovery tank repair. The Dorman 603-008 part number is also useful when matching an OE-style replacement by catalog reference.
Common Problems This Part Addresses
- Cracked or leaking coolant reservoir housing
- Broken cap or pressure-retention issues
- Low coolant level warnings tied to reservoir sensor faults
- Heat-related plastic fatigue from long-term engine bay exposure
- Fitment problems after replacing a damaged original tank
Installation Notes and Tips
Verify the reservoir shape, cap style, sensor provision, and mounting-hole layout before installation. Transfer any required hoses and electrical connections from the original setup as needed, and inspect the surrounding cooling system for leaks, hardened hoses, or damaged clamps before refilling. Confirm the cooling system is properly bled after installation to help maintain stable coolant circulation.
Quality Assurance
Dorman manufactures this replacement coolant reservoir from quality materials and builds it to match original fit and function for the listed Chevrolet Silverado HD and GMC Sierra HD applications. Part number 603-008 is intended for direct replacement service on the confirmed vehicle fitments.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Engine Coolant Reservoir for Silverado and Sierra HD
This Dorman engine coolant reservoir is a direct replacement for select heavy-duty GM trucks, including 2011-2016 Chevrolet Silverado 2500 HD and Silverado 3500 HD, plus 2011-2016 GMC Sierra 2500 HD and Sierra 3500 HD. Built from plastic to handle underhood heat and vibration, it matches the original fit and function for service replacement work.
- Direct replacement engine coolant reservoir for OE-style fit and function
- Plastic construction for underhood durability
- Natural finish with irregular shape to match the original layout
- Twist cap design with a 20 pressure rating
- Level sensor included for applications that use reservoir monitoring
- Cap included for a complete replacement assembly
- Fits 2011-2016 Chevrolet Silverado 2500 HD and Silverado 3500 HD
- Fits 2011-2016 GMC Sierra 2500 HD and Sierra 3500 HD
Detailed Product Overview
Dorman 603-008 is engineered as a replacement coolant overflow tank for heavy-duty Chevrolet Silverado and GMC Sierra trucks. The reservoir is shaped to match the original mounting layout, with two mounting holes and no separate mounting brackets or hardware included. Its 1.7 L capacity, pressurized design, and twist-style cap support proper coolant expansion and recovery in the cooling system. This part cross-references OE numbers such as 13502509 and 22769155 for the same application. For buyers searching by vehicle, this is a practical choice for Silverado 2500 HD coolant reservoir replacement, Silverado 3500 HD coolant tank service, and Sierra HD coolant recovery tank repair. The Dorman 603-008 part number is also useful when matching an OE-style replacement by catalog reference.
Common Problems This Part Addresses
- Cracked or leaking coolant reservoir housing
- Broken cap or pressure-retention issues
- Low coolant level warnings tied to reservoir sensor faults
- Heat-related plastic fatigue from long-term engine bay exposure
- Fitment problems after replacing a damaged original tank
Installation Notes and Tips
Verify the reservoir shape, cap style, sensor provision, and mounting-hole layout before installation. Transfer any required hoses and electrical connections from the original setup as needed, and inspect the surrounding cooling system for leaks, hardened hoses, or damaged clamps before refilling. Confirm the cooling system is properly bled after installation to help maintain stable coolant circulation.
Quality Assurance
Dorman manufactures this replacement coolant reservoir from quality materials and builds it to match original fit and function for the listed Chevrolet Silverado HD and GMC Sierra HD applications. Part number 603-008 is intended for direct replacement service on the confirmed vehicle fitments.
