




🚗 Keep your engine cool and your ride flawless — don’t get left behind!
The 603-383 Pressurized Coolant Reservoir by Dorman is a direct-fit replacement part compatible with select Buick and Chevrolet models. Weighing just over a pound and built with durable materials, it withstands engine heat and vibration while ensuring seamless installation. Backed by a century of aftermarket expertise, this reservoir guarantees precise fit and reliable performance to keep your cooling system running optimally.





| Manufacturer | Dorman Products |
| Brand | Dorman |
| Model | 603-383 |
| Item Weight | 1.09 pounds |
| Product Dimensions | 8.7 x 6.52 x 8.3 inches |
| Item model number | 603-383 |
| Exterior | Machined |
| Manufacturer Part Number | 603-383 |
| OEM Part Number | DAKG-15390; FRT1216C; 13256823; 13393368; 13465094; 13502353 |
| Position | Center |
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