--- product_id: 10120696 title: "ACDelco GM Original Equipment RC27 (10409635) Radiator Fill Cap" brand: "acdelco" price: "107.42 DT" currency: TND in_stock: true reviews_count: 13 category: "Ac Delco" url: https://www.desertcart.tn/products/10120696-acdelco-gm-original-equipment-rc27-10409635-radiator-fill-cap store_origin: TN region: Tunisia --- # Seals & pressurizes cooling system efficiently Vehicle-specific fit for GM models Premium aftermarket OEM-grade quality ACDelco GM Original Equipment RC27 (10409635) Radiator Fill Cap **Brand:** acdelco **Price:** 107.42 DT **Availability:** ✅ In Stock ## Summary > 🚗 Lock in peak engine performance with the GM-approved radiator cap everyone’s upgrading to! ## Quick Answers - **What is this?** ACDelco GM Original Equipment RC27 (10409635) Radiator Fill Cap by acdelco - **How much does it cost?** 107.42 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/10120696-acdelco-gm-original-equipment-rc27-10409635-radiator-fill-cap) ## Best For - acdelco enthusiasts ## Why This Product - Trusted acdelco brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Perfect OEM Fit:** Engineered to match GM’s exact specifications for seamless installation and zero wobble. - • **Durable Construction:** Crafted from high-quality plastic and metal for long-lasting, professional-grade durability. - • **Reliable Cooling Seal:** Maintains optimal pressure to prevent leaks and overheating, protecting your engine’s performance. - • **Universal GM Coverage:** Fits most GM cars, SUVs, and trucks on the road today—one cap to rule your fleet. - • **Trusted Brand Assurance:** Backed by ACDelco’s 24-month unlimited mile warranty for peace of mind on every drive. ## Overview The ACDelco GM Original Equipment RC27 Radiator Fill Cap is a premium, vehicle-specific replacement part designed to seal and pressurize your GM vehicle’s cooling system. Manufactured to meet OEM standards, it ensures a perfect fit and reliable performance across most GM cars, SUVs, and trucks. Built with durable plastic and metal materials, this radiator cap helps maintain optimal engine temperature and comes with a 24-month unlimited mile warranty, making it the trusted choice for professional-grade cooling system maintenance. ## Description An ACDelco Professional, premium aftermarket Standard Type Radiator Cap is a high quality replacement for many vehicles on the road today. It seals and pressurizes your vehicle’s cooling system as the radiator transfers heat from the engine’s coolant to the outside air. This premium aftermarket replacement standard type radiator cap is manufactured to meet your expectations for fit, form, and function. Review: perfect fit, exactly what I needed - Got this for my truck and it fits perfectly, feels exactly like the factory part should with no wobble or weirdness. OEM GM parts are usually a safe bet and this one is no different, solid construction and it seals up nicely. Ships quickly and comes well packaged so it shows up in good shape without any damage. If your current cap is giving you trouble just grab the ACDelco replacement and call it a day. Review: Seems functional - Fits well and does the job. It looks nice also. ## Features - Fit most models of gm vehicles on the road today for more coverage - Seal and pressurize your vehicle’s cooling system as the radiator transfers heat from the engine’s coolant to the outside air - Professional, premium aftermarket replacement radiator cap - Provides the performance and dependability you expect from acdelco - Manufactured to meet expectations for fit, form, and function - Fit type: Vehicle Specific ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000C9SP4W | | Automotive Fit Type | Vehicle Specific Fit | | Best Sellers Rank | #16,496 in Automotive ( See Top 100 in Automotive ) #5 in Automotive Replacement Radiator Standard | | Brand | ACDelco | | Brand Name | ACDelco | | Closure Type | Twist-On | | Color | Silver | | Compatible with Vehicle Type | Car,Suv,Truck | | Customer Reviews | 4.6 out of 5 stars 1,976 Reviews | | Exterior Finish | Machined | | Global Trade Identification Number | 00036666946543 | | Included Components | 10409635 | | Item Dimensions | 2.5 x 2.4 x 1.5 inches | | Item Type Name | CAP,RAD FIL | | Item Weight | 1.6 ounces | | Item dimensions L x W x H | 2.5 x 2.4 x 1.5 inches | | Manufacturer | AC Delco | | Manufacturer Part Number | 10409635 | | Manufacturer Warranty Description | 24 Month / Unlimited Mile Limited Warranty on parts sold on or after 04/01/18. (Parts Only) Please see ACDelco.com for more details. | | Material | Plastic Metal | | Material Type | Plastic Metal | | Model Number | RC27 | | Number of Items | 1 | | OEM Equivalent Part Number | 10409635 | | Style Name | Professional | | UPC | 036666946543 | | Unit Count | 1 Count | | Vehicle Service Type | Car,Suv,Truck | ## Product Details - **Brand:** ACDelco - **Color:** Silver - **Exterior Finish:** Machined - **Item dimensions L x W x H:** 2.5 x 2.4 x 1.5 inches - **Material:** Plastic Metal ## Images ![ACDelco GM Original Equipment RC27 (10409635) Radiator Fill Cap - Image 1](https://m.media-amazon.com/images/I/71LT439L2FL.jpg) ![ACDelco GM Original Equipment RC27 (10409635) Radiator Fill Cap - Image 2](https://m.media-amazon.com/images/I/71kH5p+S32L.jpg) ## Questions & Answers **Q: Where is this cap made?** A: always replace with factory part as much as you can **Q: Will this fit a 1992 silverado 5.7** A: As far as I know it was. My husband died back in March. I know he didn't send it back. **Q: Please advice what filler neck will suite to this cap - 43mm/56 mm/68mm?** A: 43mm **Q: will it fit 93 corvette** A: The picture looks nothing like the RC27. It's metal not plastic. Sorry can't help you with the 93 Vette. I used it on a 93 Cadillac Deville with a 4.9L V8. Not sure if it's to your application, but if yours is plastic - this isn't the one for you. - John ## Customer Reviews ### ⭐⭐⭐⭐⭐ perfect fit, exactly what I needed *by M***C on April 5, 2026* Got this for my truck and it fits perfectly, feels exactly like the factory part should with no wobble or weirdness. OEM GM parts are usually a safe bet and this one is no different, solid construction and it seals up nicely. Ships quickly and comes well packaged so it shows up in good shape without any damage. If your current cap is giving you trouble just grab the ACDelco replacement and call it a day. ### ⭐⭐⭐⭐⭐ Seems functional *by H***Y on April 3, 2026* Fits well and does the job. It looks nice also. ### ⭐⭐⭐⭐⭐ Looks and works like my Firebird's OEM radiator cap, rather than the aftermarket cap it replaced *by C***N on June 11, 2020* I found the same cap at a lot of car parts web sites, but this had the best price, and with Prime, fast shipping at no extra charges. My 81 Trans Am had been giving me a lot of check engine lights, and in retrospect, probably because of overheating, even though with the previous cap, the water temp gauge never went over 220. After I installed this cap, and a few cycles between hot and cold, the check engine light doesn't come on anymore, so the engine isn't overheating. (It never overheated enough to blow steam, though). My T/A came from the factory without A/C, so it has the non-A/C radiator. I added a Vintage Air A/C system. With it off, the water temp stays at 220, but with the new cap, and the AC on, the temp goes up really high, but I don't get check engine lights. I think the old cap wasn't holding pressure, and the water in the block was turning to steam, which doesn't transfer heat very well. The new cap holds pressure, the water doesn't turn to steam, so the water carries more heat, and the temp gauge reads higher. I have a now unavailable flex radiator fan, and when the A/C is off, the water temp cools down quickly. I have a polished aluminum Cold Case radiator which will replace the OEM radiator. That should be the last piece of the overheating puzzle. ## Frequently Bought Together - ACDelco GM Original Equipment RC27 15 P.S.I. Radiator Cap - FEL-PRO 35062 Engine Coolant Outlet Gasket for Chevrolet K1500 - 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/10120696-acdelco-gm-original-equipment-rc27-10409635-radiator-fill-cap](https://www.desertcart.tn/products/10120696-acdelco-gm-original-equipment-rc27-10409635-radiator-fill-cap) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-09-02*