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The Dorman 603-039 Front Coolant and Washer Fluid Reservoir is a direct replacement part designed specifically for select Chevrolet and GMC models. Manufactured from durable materials to resist heat and vibration, it ensures reliable engine cooling and washer fluid storage. With a precise fit and easy installation, this reservoir is backed by a century of Dorman’s trusted automotive aftermarket experience.





| ASIN | B01KKFP27K |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #432,982 in Automotive ( See Top 100 in Automotive ) #681 in Automotive Reservoirs |
| Brand | Dorman |
| Brand Name | Dorman |
| Capacity | 1.5 Liters |
| Compatible with Vehicle Type | Van |
| Customer Reviews | 4.7 out of 5 stars 347 Reviews |
| Exterior Finish | Machined |
| Fit Type | Vehicle Specific |
| Global Trade Identification Number | 00019495433002 |
| Included Components | 1 Coolant/Washer Reservoir, 2 Caps |
| Item Dimensions | 11.45 x 7.28 x 19.09 inches |
| Item Type Name | Engine Coolant Reservoir |
| Item Weight | 3.77 Pounds |
| Item dimensions L x W x H | 11.45 x 7.28 x 19.09 inches |
| Manufacturer | Dorman Products |
| Manufacturer Part Number | 603-039 |
| Manufacturer Warranty Description | Manufacturer Warranty |
| Material | Aluminum |
| Material Type | Aluminum |
| Model Number | 603-039 |
| OEM Equivalent Part Number | 12363310; 22677855 |
| Product Grade | Replacement Part |
| UPC | 019495433002 |
| Unit Count | 1.0 Count |
| Vehicle Service Type | Van |
C**A
Good Fit, 2 pump motors front and back as strong as original in all respects. Read Notes
This came with 2 pump motors on it. One is for a back window washer that I did not have. I did have a wiring harness for both with different type plugs. You must cap the output of the non used motor or it will leak fluid. It comes with a new front wiper hose feed and also comes with a new hose to go to the radiator for the overflow also. It does not come with the 2 rubber feet that slip onto the bottom as a cushion and it does not come with the two plastic pop attachments that hold the 2 bottles to the top frame. This seems as strong and well made as the original. Comes with new caps. The pump on the front of this, facing the front of the vehicle is the front washer pump. I recommend using electrical contact grease. You may want to clean the chassis ground wire connection near the front of where the bottles sit.
P**C
Perfect Replacement Coolant/Windshield Washer Reservoir
Exact Same in every aspect as the original reservoir on my 2003 Chevrolet Astro Van. The reservoir is made of heavy duty plastic. The hose connections, electrical wiring connections, mounting holes up top and mounting nipples at the bottom are an exact match. (Note: remove and reinstall the black rubber sleeves from the old reservoir onto the bottom Mounting nipples of the new reservoir). This reservoir comes with the windshield washer fluid pump as well as the washer fluid pump for the rear hatch window. It was easy to install, 30 minutes total to remove the old reservoir, and install, fill and test this new reservoir. The reservoir arrived on the date promised and came very well packaged. Excellent Product and Price, and a Great Seller. I couldn't be happier. I definitely recommend this product from this seller.
T**A
Perfect fit
Installed on 97 Astro van. Came with 2 pumps (Front and rear) pre-installed on the windshield washer tank which is a plus. I thought I would have to re-use the old ones. No bottom grommets so be sure to remove the ones from the old tank and re-use those. Radiator connector hose was included and of good quality dense rubber. There is no clamp for the radiator connector hose at the radiator cap so expect that. This kit also included some clear replacement tubing, but they were really small diameter, like a fish tank pump would use. Dunno what that was for but definitely not to replace the washer tubing as mine were a bit larger. You can re-use the existing tubing, but I replaced both of mine with some tubing I had in stock.
J**B
Very easy to install
Worked perfectly but what I didn’t know was there’s another pump on the backside of this unit which doesn’t apply to my truck
M**E
As described
Just as described
D**.
Fits correct
No problems, goes right in easy-peasy.
R**R
Recovery and washer combo
Great replacement part complete with washer pumps. Easy to install and very durable.
K**D
Great product, Good Value, Fast Delivery!
It is a great replacement for the the original, which cracked at the top where it attaches to the front crossbeam before the clips, after 17 years. Direct OE fitment. Be sure to take off the rubber bumpers and hose from the old reservior. Also be careful taking the old one out beong mindful of the electrical connectors to the window washer pumps, L. Side and back. Also make sure that the winshield washer fluid hoses are hooked up to the corresponding pumps, windshield and rear window repectively. Videos are available online. It might help to empty the old one first before removing(Syphon or pump out).
J**E
excelente
llego a tiempo,, excelente calidad y inclusive trae los dos motores para chisgeteros
A**R
Bargain
Fits perfectly and at a fraction of the price I was quoted elsewhere
M**E
Identical to original
Just remeber to keep your old one to salvage the rubber bits at the bottom as they do not come with the replacement.
S**S
Fit Astro Van
Very good
F**O
Bien fabricado
Quedó perfecto como original
Trustpilot
1 month ago
2 months ago