






š Upgrade your ride with confidenceācoolant care that keeps you cruising!
The Dorman 603-100 Non-Pressurized Coolant Reservoir is a durable, direct replacement part designed to match the original equipment fit and function for select Cadillac, Chevrolet, and GMC models. Made from high-quality plastic, it withstands engine heat and vibration, ensuring reliable performance. Backed by a century of aftermarket expertise, this reservoir offers seamless installation and precise vehicle compatibility for a worry-free upgrade.










| ASIN | B000E300OE |
| Best Sellers Rank | #47,368 in Automotive ( See Top 100 in Automotive ) #54 in Automotive Reservoirs |
| Brand | Dorman |
| Customer Reviews | 4.7 4.7 out of 5 stars (942) |
| Date First Available | July 7, 2004 |
| Exterior | Ready To Paint If Needed |
| Hollander Number | 671-218 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1.5 pounds |
| Item model number | 603-100 |
| Manufacturer | Dorman Products |
| Manufacturer Part Number | 603-100 |
| Model | FLUID RESERVOIR |
| OEM Part Number | 650373; DAKG-650373; FRT1203C; RC77; SK603100; 15630112; 15650373 |
| Position | Front |
| Product Dimensions | 11.5 x 8.75 x 7 inches |
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!!
W**S
Perfect Replacement.
Perfect replacement for my 94 Silverado K1500. Looks great in my truck. Old one you couldnāt 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.
L**S
Perfect fit
Perfect fit in my 98 k2500 Chevy obs
D**N
I like it. Nice and clear
Works and no leaks.
T**R
Like in kind replacement
I was replacing an old version of this and the one that something that was more cleaned up. Super quick, easy install my only recommendation I would order new bolts check complete the cleaned up look
F**R
So far works good.
So far works good.
K**T
Great Product
Great Product
J**E
Fits great
Works and fits as it should, I used this on a 1997 k3500 truck.
H**T
IdƩntico al original , encaja perfecto
G**D
Perfect fit and just as advertised
B**L
Great product
J**A
Me parece un excelente producto en relación precio-calidad, en lo personal lo recomiendo
A**R
It came very quick and is as advertised
Trustpilot
2 months ago
2 months ago