--- product_id: 74032184 title: "Dorman 603-100 Non-Pressurized Coolant Reservoir with Cap Compatible with Select Cadillac/Chevrolet/GMC Models" brand: "dorman" price: "$207.31" currency: USD in_stock: true reviews_count: 5 category: "Dorman" url: https://www.desertcart.us/products/74032184-dorman-603-100-non-pressurized-coolant-reservoir-with-cap-compatible store_origin: US region: United States of America --- # 100+ years trusted design Heat-resistant durability Precision OEM fit Dorman 603-100 Non-Pressurized Coolant Reservoir with Cap Compatible with Select Cadillac/Chevrolet/GMC Models **Brand:** dorman **Price:** $207.31 **Availability:** ✅ In Stock ## Summary > 🚗 Upgrade your ride’s heart with trusted precision and durability! ## Quick Answers - **What is this?** Dorman 603-100 Non-Pressurized Coolant Reservoir with Cap Compatible with Select Cadillac/Chevrolet/GMC Models by dorman - **How much does it cost?** $207.31 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/74032184-dorman-603-100-non-pressurized-coolant-reservoir-with-cap-compatible) ## Best For - dorman enthusiasts ## Why This Product - Trusted dorman brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Endure:** Crafted from premium materials designed to withstand intense underhood heat and constant engine vibrations without compromise. - • **Seamless OEM Fit:** Engineered to match original specs for effortless installation and perfect compatibility with select Cadillac, Chevrolet, and GMC models. - • **Customizable Finish:** Exterior ready to paint, allowing you to personalize or restore your engine bay’s aesthetic with ease. - • **Legacy of Reliability:** Backed by over a century of automotive aftermarket expertise, ensuring you get a part that lasts and performs. - • **Verified Compatibility:** Use the desertcart Garage tool to confirm exact fitment by make, model, and trim—no guesswork, just confidence. ## Overview The Dorman 603-100 Non-Pressurized Coolant Reservoir is a high-quality replacement part designed for select Cadillac, Chevrolet, and GMC vehicles. Manufactured to OEM standards, it offers a perfect fit, exceptional heat and vibration resistance, and is backed by over 100 years of aftermarket expertise. Ready to paint and easy to install, it ensures your engine cooling system stays reliable and stylish. ## 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: Se mira estupendo - Idéntico al original , encaja perfecto Review: Coolant overflow tank - Perfect fit and just as advertised ## Features - 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 desertcart Garage - International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000E300OE | | Brand | Dorman | | Customer Reviews | 4.7 4.7 out of 5 stars (913) | | Date First Available | 8 Aug. 2012 | | Exterior | Ready To Paint If Needed | | Item Weight | 680 g | | 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 | 29.21 x 22.23 x 17.78 cm; 680.39 g | ## Product Details - **Brand:** Dorman - **Material:** Plastic - **Fit type:** Vehicle Specific - **Item dimensions L x W x H:** 29.2 x 22.2 x 17.8 centimetres - **Exterior finish:** Ready To Paint If Needed ## 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 ### ⭐⭐⭐⭐⭐ Se mira estupendo *by H***T on 3 June 2025* Idéntico al original , encaja perfecto ### ⭐⭐⭐⭐⭐ Coolant overflow tank *by G***D on 9 May 2025* Perfect fit and just as advertised ### ⭐⭐⭐⭐⭐ Fitment and Quality spot on. *by B***. on 15 April 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. ## 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.us/products/74032184-dorman-603-100-non-pressurized-coolant-reservoir-with-cap-compatible](https://www.desertcart.us/products/74032184-dorman-603-100-non-pressurized-coolant-reservoir-with-cap-compatible) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-03*