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- £77.99
- £77.99
- Unit price
- per
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Description
xX4XZ 603973 Coolant Overflow Reservoir Tank with Cap is a purposeful replacement designed for GM family vehicles. Engineered to accommodate coolant expansion and contraction, it helps maintain steady cooling system behavior as you drive.
Designed for a wide GM vehicle range
The reservoir is a compatible fit for Cadillac Escalade lineups (2015–2018, 6.2L engines, including ESV variants), GMC Sierra 1500 across multiple trims, Chevrolet Silverado 1500, Tahoe, and Suburban models from 2014–2018, along with Yukon and Yukon XL family members. The data-backed fitment aims to help you verify a direct replacement for your specific build. Please review the second main image to confirm compatibility with your car before purchasing.
- Cadillac Escalade (2015–2018) 6.2L and Escalade ESV variants
- GMC Sierra 1500 (2014–2018) across multiple engines
- Chevrolet Silverado 1500 (2014–2018) and Tahoe/Suburban variants
- Yukon / Yukon XL (2015–2018) lineups
What this reservoir offers
- Provides a dedicated expansion space for excess coolant as the engine heats up
- Helps maintain a consistent temperature range within the cooling system during operation
- Durable construction designed to withstand regular use and road conditions
Quality, fit, and installation
- OE-style part numbers referenced: 603-973, 22856231, 13502354, 3014134, 67100359
- Package includes: 1 x coolant reservoir tank; instruction manual not included
- Thorough testing for fit and performance on targeted vehicle applications
- Professional installation is highly recommended for best results
- After-sales support: 24-hour service and 1-year product coverage
If you’re replacing an aging reservoir, this model presents a practical option to refresh the cooling system without altering engine components. It’s important to compare the second main image for exact compatibility and to consult a professional for installation if needed.
FAQ
Q: What vehicles is this reservoir compatible with?
A: It fits select GM models listed in the data; verify your year and engine to confirm compatibility before purchasing.
Q: What’s included in the package and installation guidance?
A: Package includes one reservoir tank; instruction manual not included; professional installation is recommended.
Shipping & Return
xReturns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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