--- product_id: 1776615 title: "Dorman 603-100 Non-Pressurized Coolant Reservoir with Cap Compatible with Select Cadillac / Chevrolet / GMC Models" price: "435.24 DT" currency: TND in_stock: true reviews_count: 13 url: https://www.desertcart.tn/products/1776615-dorman-603-100-non-pressurized-coolant-reservoir-with-cap-compatible store_origin: TN region: Tunisia --- # Heat & vibration resistant Direct OEM fit & function Easy, seamless installation Dorman 603-100 Non-Pressurized Coolant Reservoir with Cap Compatible with Select Cadillac / Chevrolet / GMC Models **Price:** 435.24 DT **Availability:** ✅ In Stock ## Summary > 🔥 Keep your engine cool, your ride flawless, and your confidence unstoppable! ⚙️ ## Quick Answers - **What is this?** Dorman 603-100 Non-Pressurized Coolant Reservoir with Cap Compatible with Select Cadillac / Chevrolet / GMC Models - **How much does it cost?** 435.24 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/1776615-dorman-603-100-non-pressurized-coolant-reservoir-with-cap-compatible) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Trusted Legacy:** Backed by 100 years of automotive aftermarket expertise for peace of mind. - • **Built to Endure:** Crafted from premium plastic designed to withstand intense underhood heat and constant vibration. - • **Effortless Upgrade:** Seamless installation means less downtime and more time on the road. - • **Precision OEM Match:** Engineered to perfectly replace your original coolant reservoir for flawless fit and function. - • **Custom Fit Guarantee:** Use our garage tool to ensure exact compatibility with your Cadillac, Chevrolet, or GMC model. ## Overview The Dorman 603-100 Non-Pressurized Coolant Reservoir is a direct replacement part designed for select Cadillac, Chevrolet, and GMC vehicles. Made from durable plastic, it resists heat and vibration while matching the original part’s fit and function. Backed by a century of aftermarket expertise, it ensures reliable performance and easy installation, making it the smart choice for maintaining your vehicle’s cooling system. ## Description This replacement engine coolant reservoir is manufactured from quality materials to withstand the stresses of underhood heat and engine vibration. It is engineered and manufactured to match the fit and function of the original part. Review: Fitment and Quality spot on. - Perfect fit. Was cheaper buying it here than locally from NAPA amd O'Reillys here in Hawaii. Saved me almost $30 dollars. Very happy with fitment and quality. Review: 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. ## Features - Direct replacement - this engine coolant reservoir matches the fit and function of the original part.Material:Plastic - Ideal solution - engineered for a seamless installation - Durable construction - manufactured from quality materials to withstand underhood heat and vibration - Trustworthy design - backed by 100 years of automotive aftermarket experience - Ensure fit - to make sure this part fits your exact vehicle, input your make, model and trim level into the garage tool ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000E300OE | | Best Sellers Rank | #108,716 in Automotive ( See Top 100 in Automotive ) #128 in Automotive Reservoirs | | Brand | Dorman | | Customer Reviews | 4.7 4.7 out of 5 stars (950) | | 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 | ## Product Details - **Brand:** Dorman - **Material:** Plastic - **Fit Type:** Vehicle Specific - **Item dimensions L x W x H:** 11.5 x 8.75 x 7 inches - **Exterior Finish:** Machined ## Images ![Dorman 603-100 Non-Pressurized Coolant Reservoir with Cap Compatible with Select Cadillac / Chevrolet / GMC Models - Image 1](https://m.media-amazon.com/images/I/61xkHSaknhL.jpg) ![Dorman 603-100 Non-Pressurized Coolant Reservoir with Cap Compatible with Select Cadillac / Chevrolet / GMC Models - Image 2](https://m.media-amazon.com/images/I/51B0m26J0RL.jpg) ![Dorman 603-100 Non-Pressurized Coolant Reservoir with Cap Compatible with Select Cadillac / Chevrolet / GMC Models - Image 3](https://m.media-amazon.com/images/I/91+ZwqnEC-L.jpg) ![Dorman 603-100 Non-Pressurized Coolant Reservoir with Cap Compatible with Select Cadillac / Chevrolet / GMC Models - Image 4](https://m.media-amazon.com/images/I/61DmLCn-0tL.jpg) ![Dorman 603-100 Non-Pressurized Coolant Reservoir with Cap Compatible with Select Cadillac / Chevrolet / GMC Models - Image 5](https://m.media-amazon.com/images/I/51-N++dRBML.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Fitment and Quality spot on. *by B***. on April 15, 2026* Perfect fit. Was cheaper buying it here than locally from NAPA amd O'Reillys here in Hawaii. Saved me almost $30 dollars. Very happy with fitment and quality. ### ⭐⭐⭐⭐⭐ Perfect Replacement. *by W***S on October 25, 2025* 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. ### ⭐⭐⭐⭐⭐ Great for alternative use *by E***T on June 11, 2016* I cannot attest to this products intended use so I can't say if it fits your car's needs or not. I am using this as a reservoir for an onboard shower in my subaru crosstrek. It is built very well and has an irregular shape so it fits eight where i need it to. Very simple desogn means fewer things to go wrong. It has a capacity of roughly 1.5 gallons. Bottom spigot is lined with metal on the inside and the cap has a blow off spout integrated into it. Im very happy with this for my purpose. It is so well built, however, that with a few modifications it could probably be used in many cars's with many purposes. All praise Lord Xenu. ## Frequently Bought Together - Dorman 603-100 Front Engine Coolant Reservoir Compatible with Select Cadillac / Chevrolet / GMC Models - ACDelco GM Original Equipment RC27 15 P.S.I. Radiator Cap - ACDelco Professional 252-719 Water Pump Kit --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/1776615-dorman-603-100-non-pressurized-coolant-reservoir-with-cap-compatible](https://www.desertcart.tn/products/1776615-dorman-603-100-non-pressurized-coolant-reservoir-with-cap-compatible) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-06-01*