





🚗 Upgrade your ride with confidence—cool smarter, drive stronger!
The Dorman603-100 Non-Pressurized Coolant Reservoir is a direct replacement part compatible with select Cadillac, Chevrolet, and GMC models. Made from durable plastic, it resists heat and vibration for long-lasting performance. Designed for seamless installation and backed by 100 years of Dorman’s automotive aftermarket expertise, this reservoir ensures a perfect fit and reliable cooling system maintenance.




| Manufacturer | Dorman Products |
| Brand | Dorman |
| Model | FLUID RESERVOIR |
| Item Weight | 1.5 pounds |
| Product Dimensions | 11.5 x 8.75 x 7 inches |
| Item model number | 603-100 |
| Is Discontinued By Manufacturer | No |
| Exterior | Ready To Paint If Needed |
| Manufacturer Part Number | 603-100 |
| OEM Part Number | 650373; DAKG-650373; FRT1203C; RC77; SK603100; 15630112; 15650373 |
| Hollander Number | 671-218 |
| Position | Front |
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