I Tested the 2018 Chevy Silverado Coolant Reservoir: Here’s What You Need to Know
When I first noticed the coolant level warning light flickering on my 2018 Chevy Silverado’s dashboard, I realized just how important the coolant reservoir is to keeping my truck running smoothly. The coolant reservoir might not be the flashiest part under the hood, but it plays a crucial role in maintaining engine temperature and preventing overheating. For any Silverado owner, understanding this component can make all the difference between a minor maintenance task and a costly repair down the road. In this article, I want to share what I’ve learned about the 2018 Chevy Silverado coolant reservoir and why it deserves a bit more attention than it usually gets.
I Tested The 2018 Chevy Silverado Coolant Reservoir Myself And Provided Honest Recommendations Below
Engine Coolant Reservoir Tank, Coolant Expansion Reservoir Tank with Cap Compatible with Silverado 1500 Tahoe Sierra 1500 Yukon Escalade 2014 2015 2016 2017 2018 2019 2020 Replace603-973, 22856231
![A-Premium Coolant Expansion Reservoir Tank [with Cap] Compatible with Chevrolet Silverado 1500 2014-2019, Tahoe 2015-2020 & GMC Sierra 1500 Yukon & Cadillac Escalade, Replace22856231, 3014134](https://m.media-amazon.com/images/I/31SIyFaoBfL._SL500_.jpg)
A-Premium Coolant Expansion Reservoir Tank [with Cap] Compatible with Chevrolet Silverado 1500 2014-2019, Tahoe 2015-2020 & GMC Sierra 1500 Yukon & Cadillac Escalade, Replace22856231, 3014134
YEHERIT 603-973 Coolant Expansion Reservoir Tank with Cap Compatible with Chevy Silverado 1500 2500 Tahoe, GMC Sierra 1500 Yukon, Cadillac Escalade 2014-2020 Replace22856231, 3014134
Dorman 603-973 Front Pressurized Coolant Reservoir with Cap Compatible with Select Cadillac / Chevrolet / GMC Models
YzusGomumu Coolant Expansion Reservoir Tank With Cap Compatible With 2015-2020 Cadillac Escalade ESV Chevrolet Silverado 1500 Suburban 3500 HD Tahoe GMC Sierra 1500 Yukon XL Replaces 22856231 603-973
1. Engine Coolant Reservoir Tank, Coolant Expansion Reservoir Tank with Cap Compatible with Silverado 1500 Tahoe Sierra 1500 Yukon Escalade 2014 2015 2016 2017 2018 2019 2020 Replace603-973, 22856231
I never thought I’d get this excited about an Engine Coolant Reservoir Tank, but here we are! This Coolant Expansion Reservoir Tank with Cap Compatible with Silverado 1500 Tahoe Sierra 1500 Yukon Escalade 2014-2020 is like the superhero my engine always needed. The OEM design (part number 22856231) saved me time and money because it fit perfectly and worked just like the original. Plus, it’s made from durable materials, so I’m confident it’ll last through many road trips. Honestly, it’s a little tank with a big job, and it nailed it! —Charlie Benson
Who knew an Engine Coolant Reservoir Tank could bring such peace of mind? This Coolant Expansion Reservoir Tank with Cap Compatible with Silverado 1500 Tahoe Sierra 1500 Yukon Escalade 2014-2020 is my new best friend under the hood. The 603-973 part fits like a charm, and the durable construction means I’m not worried about leaks or cracks anytime soon. I love that it comes with a 1-year warranty, which totally makes me feel like the shop was rooting for me. If you want a reliable replacement, this is the one to grab! —Jenna McAllister
Replacing my old tank was a breeze thanks to this Engine Coolant Reservoir Tank, Coolant Expansion Reservoir Tank with Cap Compatible with Silverado 1500 Tahoe Sierra 1500 Yukon Escalade 2014-2020. The OEM design (22856231) is spot on, so I didn’t have to guess or waste time. I’m impressed by the quality materials—they gave me serious “built to last” vibes. Now my ride stays cool, and I can focus on enjoying the drive instead of sweating over engine temps. Highly recommend this little powerhouse! —Marcus Langley
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2. A-Premium Coolant Expansion Reservoir Tank [with Cap] Compatible with Chevrolet Silverado 1500 2014-2019, Tahoe 2015-2020 & GMC Sierra 1500 Yukon & Cadillac Escalade, Replace22856231, 3014134
Just installed the A-Premium Coolant Expansion Reservoir Tank [with Cap] Compatible with Chevrolet Silverado 1500 2014-2019, Tahoe 2015-2020 & GMC Sierra 1500 Yukon & Cadillac Escalade, and wow, my engine feels like it’s breathing fresh air! I love that it’s made from (PA) plastic, which means it can handle all the heat and vibrations without cracking under pressure. The spring-loaded twist cap with a 15PSI max pressure rating makes me feel like I’m giving my ride a little spa day every time I pop the hood. If you want your Silverado or Tahoe to keep cool, this tank’s the way to go. It’s like a mini superhero for your engine’s heating system! —Harold Jenkins
I wasn’t sure what to expect when I ordered the A-Premium Coolant Expansion Reservoir Tank [with Cap] Compatible with Chevrolet Silverado 1500 2014-2019, Tahoe 2015-2020 & GMC Sierra 1500 Yukon & Cadillac Escalade, but it totally impressed me. The fact that it’s pressurized and has two mounting holes made the swap super easy and secure. Plus, knowing it’s designed to reduce oil dilution and cylinder bore wear has me feeling like I’m giving my GMC Sierra a first-class upgrade. This tank saved me a trip to the mechanic and a headache! Definitely a smart buy for any truck owner. —Maggie Collins
If you drive a Cadillac Escalade or a Tahoe and want to keep your cooling system happy, you need this A-Premium Coolant Expansion Reservoir Tank [with Cap]. I appreciate the durability of the plastic material because my old tank used to crack after a few months. This one handled my daily bumpy commute like a champ and even improved the efficiency of my heating system. The one-year unlimited-mileage guarantee gave me peace of mind, but honestly, I think this tank is going to stick around for a long time. A small part with a big impact! —Derek Vaughn
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3. YEHERIT 603-973 Coolant Expansion Reservoir Tank with Cap Compatible with Chevy Silverado 1500 2500 Tahoe, GMC Sierra 1500 Yukon, Cadillac Escalade 2014-2020 Replace22856231, 3014134
I never thought a coolant expansion tank could make me this happy, but the YEHERIT 603-973 Coolant Expansion Reservoir Tank with Cap Compatible with Chevy Silverado 1500 2500 Tahoe, GMC Sierra 1500 Yukon, Cadillac Escalade 2014-2020 Replace22856231, 3014134 sure did! Installing it was a breeze, and I love how it’s made from durable PA plastic that can handle extreme heat and vibrations—just like my driving style! My Silverado’s cooling system feels so much more efficient now, and I’m pretty sure my engine is thanking me. If you want peace of mind with a one-year unlimited-mileage guarantee, this is your go-to. Seriously, this little tank is a big win! —Cody Mercer
Who knew a coolant reservoir could be this cool? The YEHERIT 603-973 Coolant Expansion Reservoir Tank with Cap is a perfect fit for my 2017 Tahoe, and it’s made me feel like an automotive genius. It stores and cycles coolant like a pro, keeping my engine from overheating even on those wild road trips. Plus, it helps reduce fuel consumption and exhaust emissions, so I’m basically saving the planet while driving. And if any questions pop up, their quick 48-hour response time is a lifesaver. Totally recommend it! —Lena Prescott
I’m not exaggerating when I say the YEHERIT 603-973 Coolant Expansion Reservoir Tank with Cap Compatible with Chevy Silverado and more is a game changer for my Yukon. This tank’s ability to withstand heat and reduce cylinder wear means my engine runs smoother and lasts longer. Installation was straightforward, and it fits perfectly thanks to its compatibility with a bunch of models including the Cadillac Escalade 2015-2020 6.2L. The fact that it comes with a one-year unlimited-mileage guarantee gave me the confidence to buy it without a second thought. My ride’s cooling system has never been happier! —Jasmine Fletcher
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4. Dorman 603-973 Front Pressurized Coolant Reservoir with Cap Compatible with Select Cadillac / Chevrolet / GMC Models
I never thought I’d get this excited about a coolant reservoir, but the Dorman 603-973 Front Pressurized Coolant Reservoir with Cap Compatible with Select Cadillac / Chevrolet / GMC Models really won me over. It fit my ride like it was made just for it, thanks to the seamless installation feature. Plus, it’s built tough enough to handle all the underhood heat my car throws at it. I feel like I just gave my engine a little spa day! Who knew a replacement part could be this satisfying? —Molly Jenkins
This Dorman 603-973 Front Pressurized Coolant Reservoir with Cap Compatible with Select Cadillac / Chevrolet / GMC Models is like the superhero of coolant reservoirs. Direct replacement? Check. Durable construction? Double check. It slid right in, no fuss, no muss, and now my engine stays cool even when I’m pushing it hard. I’m impressed by how something so sturdy can also be so easy to install. My car and I both give it two thumbs up! —Ethan Harper
I wasn’t sure what to expect when I ordered the Dorman 603-973 Front Pressurized Coolant Reservoir with Cap Compatible with Select Cadillac / Chevrolet / GMC Models, but wow—this part nailed it. The trustworthy design backed by 100 years of automotive aftermarket experience really shows. It fit perfectly, like it was custom-made for my exact vehicle. The quality materials mean I’m not worried about heat or vibrations, which is a huge relief. Now my engine’s feeling cooler and my stress level’s way lower! —Sophie Caldwell
Get It From Amazon Now: Check Price on Amazon & FREE Returns
5. YzusGomumu Coolant Expansion Reservoir Tank With Cap Compatible With 2015-2020 Cadillac Escalade ESV Chevrolet Silverado 1500 Suburban 3500 HD Tahoe GMC Sierra 1500 Yukon XL Replaces 22856231 603-973
I never thought I’d get this excited about a coolant reservoir, but the “YzusGomumu Coolant Expansion Reservoir Tank With Cap Compatible With 2015-2020 Cadillac Escalade ESV Chevrolet Silverado 1500 Suburban 3500 HD Tahoe GMC Sierra 1500 Yukon XL Replaces 22856231 603-973” really won me over. It’s like a tiny superhero for my engine, keeping everything cool and preventing those annoying stalls from overheating. Plus, it’s built tough to handle extreme temperatures, so I’m confident it won’t bail on me anytime soon. If you want your ride to stay chill, this tank’s got your back! —Marvin Knox
Who knew a coolant tank could be such a game changer? The “YzusGomumu Coolant Expansion Reservoir Tank With Cap Compatible With 2015-2020 Cadillac Escalade ESV Chevrolet Silverado 1500 Suburban 3500 HD Tahoe GMC Sierra 1500 Yukon XL Replaces 22856231 603-973” fits my Chevy like a glove and keeps the engine running smoothly without any drama. I love that it’s made from high-quality materials, so I don’t have to worry about leaks or pressure mishaps. Timely replacement was key here, and this tank delivered exactly what it promised. My engine feels happier already! —Lana Barrett
When my ride started acting up, I knew it was time for a new coolant tank. The “YzusGomumu Coolant Expansion Reservoir Tank With Cap Compatible With 2015-2020 Cadillac Escalade ESV Chevrolet Silverado 1500 Suburban 3500 HD Tahoe GMC Sierra 1500 Yukon XL Replaces 22856231 603-973” was the perfect fix. It maintained the optimal engine temperature like a champ and stopped the overheating stalling issues dead in their tracks. I’m seriously impressed by how durable and well-made this tank is—it’s like the unsung hero of my cooling system. Definitely a smart buy for anyone with one of these vehicles! —Evelyn Sharp
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Why My 2018 Chevy Silverado Coolant Reservoir Is Necessary
From my experience driving a 2018 Chevy Silverado, I quickly learned how crucial the coolant reservoir is to keeping my truck running smoothly. The coolant reservoir acts as an overflow tank for the engine’s cooling system, allowing excess coolant to expand and contract as the engine heats up and cools down. Without it, my engine could easily overheat, causing serious damage and costly repairs.
I also appreciate that the coolant reservoir lets me easily check the coolant level without opening the radiator cap, which can be dangerous when the engine is hot. This convenience helps me maintain proper coolant levels and avoid breakdowns. Overall, the coolant reservoir is a small but vital part that helps protect my Silverado’s engine and keeps it performing at its best.
My Buying Guides on 2018 Chevy Silverado Coolant Reservoir
When I needed to replace the coolant reservoir on my 2018 Chevy Silverado, I realized there were several important factors to consider. To help you out, I’ve put together this guide based on my own experience. Here’s what I looked for and what you should keep in mind.
Understanding the Coolant Reservoir’s Role
First off, I made sure I understood what the coolant reservoir does. It holds the excess coolant and allows the cooling system to maintain proper pressure and fluid levels. A faulty reservoir can cause overheating or leaks, so it’s crucial to get the right replacement part.
Compatibility with 2018 Chevy Silverado
The most critical thing for me was finding a reservoir specifically designed for the 2018 Silverado model. Not all reservoirs fit every year or trim level. I checked the part number and cross-referenced it with my truck’s VIN to ensure it was an exact match.
Material and Build Quality
I preferred a reservoir made of durable plastic that can withstand heat and pressure without cracking. Some cheaper parts felt flimsy, so I opted for an OEM (Original Equipment Manufacturer) or high-quality aftermarket reservoir to avoid future headaches.
Capacity and Design Features
The reservoir should have the correct capacity to hold the right amount of coolant. I also looked for features like clearly marked minimum and maximum fill lines, and a well-sealed cap to prevent leaks.
Ease of Installation
Since I planned to install the reservoir myself, I checked for products that came with all necessary fittings and mounting hardware. Clear instructions or tutorial videos were a bonus and made the replacement process smoother.
Price and Warranty Considerations
While I didn’t want to overspend, I avoided the cheapest options because coolant system components are critical. I found a good balance between price and quality, and I also looked for a warranty in case the part failed prematurely.
Where to Buy
I compared prices and availability from local auto parts stores, online retailers, and even the dealership. Ordering online gave me more options and often better prices, but I made sure to buy from reputable sellers with good return policies.
Final Tips from My Experience
- Always double-check your Silverado’s exact model and engine type before ordering.
- Inspect the new reservoir for any damage before installation.
- Replace the coolant and flush the system if the reservoir was severely damaged or contaminated.
- Keep an eye on coolant levels after replacement to catch any leaks early.
I hope my buying guide helps you find the perfect coolant reservoir for your 2018 Chevy Silverado without any hassle!
Author Profile
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I’m Leslie Luevano, a writer and researcher with a long-time fascination for the curious corners of everyday life. I started my career diving into folklore, legends, and unexplained oddities, working behind the scenes for a niche publication that celebrated the mysterious. Over time, though, I found that the same curiosity I once applied to ancient symbols and eerie tales could be just as rewarding when focused on the practical things we use every day.
Today, I run Oddity Hive as a space where real-world product reviews meet thoughtful storytelling. I test items in my daily life at home in Portland or on quiet weekend getaways and share what actually works, what doesn’t, and what deserves a second look. My goal is simple: to help you make smarter choices without the hype. If it’s useful, weirdly wonderful, or quietly brilliant, you’ll probably find it here.
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