

🔥 Keep your engine cool and your ride flawless with Dorman precision! ⚙️
The Dorman 603-100 Front Engine Coolant Reservoir is a direct replacement part designed for select Cadillac, Chevrolet, and GMC vehicles. Manufactured from durable plastic, it withstands underhood heat and vibration while ensuring a perfect OEM fit. Backed by a century of aftermarket expertise, this reservoir guarantees seamless installation and reliable performance to keep your engine running smoothly.










| Manufacturer | Dorman Products |
| Brand | Dorman |
| Model | FLUID RESERVOIR |
| Product Dimensions | 29.21 x 22.23 x 17.78 cm; 680.39 g |
| Item model number | 603-100 |
| Exterior | Machined |
| Manufacturer Part Number | 603-100 |
| OEM Part Number | 650373; DAKG-650373; FRT1203C; RC77; SK603100; 15630112; 15650373 |
| Position | Front |
| Item Weight | 680 g |
J**E
Dorman Doesn't Disappoint
Needed to replace the original coolant reservoir on my 1998 OBS Silverado. This was a perfect replacement part. Quality, fitment, price and easy install!!
H**T
Se mira estupendo
Idéntico al original , encaja perfecto
G**D
Coolant overflow tank
Perfect fit and just as advertised
B**L
Great quality and exactly as described
Great product
W**S
Perfect Replacement.
Perfect replacement for my 94 Silverado K1500. Looks great in my truck. Old one you couldn’t even see the coolant inside of. Great price, seems durable and well sealed. The perfect size and seems like solid plastic. Definitely recommend to anyone looking to replace theirs.
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