Cadillac CT6 Coolant Reservoir Caps
Your Cadillac CT6 will be happy to know that the search for the right Coolant Reservoir Caps you’ve been looking for is over! Advance Auto Parts has 4 different Coolant Reservoir Caps for your vehicle, ready for shipping or in-store pick up. The best part is, our Cadillac CT6 Coolant Reservoir Caps start from as little as $12.99.
When it comes to your Cadillac CT6, you want parts and products from only trusted brands. Here at Advance Auto Parts, we work with only top reliable Coolant Reservoir Caps brands so you can shop with complete confidence. Some of our top Coolant Reservoir Caps brands are Carquest Premium and Dorman. We’re sure you will get the right product to keep that CT6 running for a long time.
We even have reviews of our OEM and aftermarket Coolant Reservoir Caps products to help you buy with confidence. Hear from other customers via the 252 reviews on parts for your Cadillac CT6.
Shop online, find the best price on the right product, and have it shipped right to your door. If you prefer to shop in person for the right Coolant Reservoir Caps for your CT6, visit one of our local Advance Auto Parts locations and you’ll be back on the road in no time!
Compare 24 Cadillac Coolant Reservoir Caps
Carquest Premium – Radiator Cap: 20 PSI (Part No.10271)
from
$19.79
Crafted to meet the exact specifications set by Original Equipment Manufacturers (OEM), these products are engineered for effortless installation and removal. Constructed from premium-grade components, incorporating proper relief and vacuum valves, they ensure optimal performance even in the most demanding automotive cooling systems. Rigorously quality-tested, these components provide exceptional, out-of-the-box performance and superior durability to meet or exceed the highest standards of today’s vehicles.
Product Features:
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Product Features:
- Maintains proper cooling system pressure
- Easy installation and removal
- 100% tested to ensure proper pressure and longevity
- Meets all OEM specifications
Dorman – Help – Engine Coolant Reservoir Cap: Twist, Plastic, 1 Pack (Part No.82597)
from
$15.49
Cracked or lost the original engine coolant reservoir cap? Replace it seamlessly and effectively with this precisely engineered, direct replacement cap.
Product Features:
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Product Features:
- Direct replacement – this engine coolant reservoir cap directly replaces a cracked or lost original cap
- Application specific – made to match dimensions of reservoir cap on only certain vehicle years, makes and models
- Seamless fit – reverse-engineered from the original equipment to fit perfectly
- Excellent value – a quick, easy replacement that’s less expensive than going back to the dealership
Dorman – Help – Engine Coolant Reservoir Cap: Twist, Plastic, 1 Pack (Part No.54218)
from
$12.99
Cracked or lost the original engine coolant reservoir cap? Replace it seamlessly and effectively with this precisely engineered, direct replacement cap.
Product Features:
See More
Product Features:
- Direct replacement – this engine coolant reservoir cap directly replaces a cracked or lost original cap
- Application specific – made to match dimensions of reservoir cap on only certain vehicle years, makes and models
- Seamless fit – reverse-engineered from the original equipment to fit perfectly
- Excellent value – a quick, easy replacement that’s less expensive than going back to the dealership
Carquest Premium – Engine Coolant Reservoir Cap (Part No.10239)
from
$8.29
Manufactured to meet all OEM specifications. Designed to be easy to install and remove. Manufactured from high quality components with proper relief and vacuum valves. Quality tested to stand up to even the most demanding automotive cooling systems.
Product Features:
See More
Product Features:
- Maintains proper cooling system pressure
- Easy installation and removal
- 100% tested to ensure proper pressure and longevity
- Meets all OEM specifications
Carquest Premium – Engine Coolant Reservoir Cap (Part No.10259)
from
$14.29
Manufactured to meet all OEM specifications. Designed to be easy to install and remove. Manufactured from high quality components with proper relief and vacuum valves. Quality tested to stand up to even the most demanding automotive cooling systems.
Product Features:
See More
Product Features:
- Maintains proper cooling system pressure
- Easy installation and removal
- 100% tested to ensure proper pressure and longevity
- Meets all OEM specifications
Dorman – Help – Engine Coolant Reservoir Cap: Spring Loaded Twist, Plastic, 1 Pack (Part No.54221)
from
$18.99
Cracked or lost the original engine coolant reservoir cap? Replace it seamlessly and effectively with this precisely engineered, direct replacement cap.
Product Features:
See More
Product Features:
- Direct replacement – this engine coolant reservoir cap directly replaces a cracked or lost original cap
- Application specific – made to match dimensions of reservoir cap on only certain vehicle years, makes and models
- Seamless fit – reverse-engineered from the original equipment to fit perfectly
- Excellent value – a quick, easy replacement that’s less expensive than going back to the dealership
Dorman – Help – Engine Coolant Reservoir Cap: Twist, Plastic, 1 Pack (Part No.54217)
from
$21.99
Cracked or lost the original engine coolant reservoir cap? Replace it seamlessly and effectively with this precisely engineered, direct replacement cap.
Product Features:
See More
Product Features:
- Direct replacement – this engine coolant reservoir cap directly replaces a cracked or lost original cap
- Application specific – made to match dimensions of reservoir cap on only certain vehicle years, makes and models
- Seamless fit – reverse-engineered from the original equipment to fit perfectly
- Excellent value – a quick, easy replacement that’s less expensive than going back to the dealership
Carquest Premium – Radiator Cap: 15 PSI (Part No.10248)
from
$14.99
Crafted to meet the exact specifications set by Original Equipment Manufacturers (OEM), these products are engineered for effortless installation and removal. Constructed from premium-grade components, incorporating proper relief and vacuum valves, they ensure optimal performance even in the most demanding automotive cooling systems. Rigorously quality-tested, these components provide exceptional, out-of-the-box performance and superior durability to meet or exceed the highest standards of today’s vehicles.
Product Features:
See More
Product Features:
- Maintains proper cooling system pressure
- Easy installation and removal
- 100% tested to ensure proper pressure and longevity
- Meets all OEM specifications
Carquest Premium – Radiator Cap: 16 PSI (Part No.10330)
from
$13.49
Crafted to meet the exact specifications set by Original Equipment Manufacturers (OEM), these products are engineered for effortless installation and removal. Constructed from premium-grade components, incorporating proper relief and vacuum valves, they ensure optimal performance even in the most demanding automotive cooling systems. Rigorously quality-tested, these components provide exceptional, out-of-the-box performance and superior durability to meet or exceed the highest standards of today’s vehicles.
Product Features:
See More
Product Features:
- Safety lever to vent coolant pressure before removal
- Maintains proper cooling system pressure
- Easy installation and removal
- 100% tested to ensure proper pressure and longevity
- Meets all OEM specifications
Dorman – Help – Engine Coolant Reservoir Cap: Twist, Plastic, 1 Pack (Part No.82590)
from
$5.79
Cracked or lost the original engine coolant reservoir cap? Replace it seamlessly and effectively with this precisely engineered, direct replacement cap.
Product Features:
See More
Product Features:
- Direct replacement – this engine coolant reservoir cap directly replaces a cracked or lost original cap
- Application specific – made to match dimensions of reservoir cap on only certain vehicle years, makes and models
- Seamless fit – reverse-engineered from the original equipment to fit perfectly
- Excellent value – a quick, easy replacement that’s less expensive than going back to the dealership
Carquest Premium – Radiator Cap: 18 PSI (Part No.10269)
from
$18.29
Crafted to meet the exact specifications set by Original Equipment Manufacturers (OEM), these products are engineered for effortless installation and removal. Constructed from premium-grade components, incorporating proper relief and vacuum valves, they ensure optimal performance even in the most demanding automotive cooling systems. Rigorously quality-tested, these components provide exceptional, out-of-the-box performance and superior durability to meet or exceed the highest standards of today’s vehicles.
Product Features:
See More
Product Features:
- Maintains proper cooling system pressure
- Easy installation and removal
- Meets all OEM specifications
- 100% tested to ensure proper pressure and longevity
Dorman – Help – Engine Coolant Reservoir Cap: Twist, Plastic, 1 Pack (Part No.54218CD)
from
$16.99
Cracked or lost the original engine coolant reservoir cap? Replace it seamlessly and effectively with this precisely engineered, direct replacement cap.
Product Features:
See More
Product Features:
- Direct replacement – this engine coolant reservoir cap directly replaces a cracked or lost original cap
- Application specific – made to match dimensions of reservoir cap on only certain vehicle years, makes and models
- Seamless fit – reverse-engineered from the original equipment to fit perfectly
- Excellent value – a quick, easy replacement that’s less expensive than going back to the dealership
ACDelco – GM Original Equipment Expansion Tank Cap (Part No.G1040465619ACD)
from
$17.61
An ACDelco GM Original Equipment Expansion Tank Cap is a spring loaded cap that seals the radiator filler neck or surge tank, and is a GM-recommended replacement for your vehicle’s original component. It maintains pressure on the cooling system while the engine is operating, which raises the boiling point of the engine coolant. It also replenishes the system with coolant from the expansion tank (if equipped) when the engine cools off. This original equipment radiator cap has been manufactured to fit your specific GM vehicle, providing the same performance, durability, and service life you expect from General Motors. Get the GM quality you know and trust with ACDelco GM Original Equipment Thermostats and Caps. Stay with the brand of parts your General Motors vehicle came with and get peace of mind that the fit, form, and function is up to the high standards and specifications of General Motors. ACDelco GM Original Equipment Thermostats and Caps are engineered for virtually every model of GM car, light duty truck, and sport utility vehicle.
Product Features:
See More
Product Features:
- Seal and maintain pressure on the cooling system for vehicle safety
- Raise the boiling point of the engine coolant to maintain efficiency
- Fit most models of GM vehicles for expanded coverage
- GM-recommended replacement part for your GM vehicle’s original factory component
- Offering the quality, reliability, and durability of GM OE
- Manufactured to GM OE specification for fit, form, and function
Carquest Premium – Engine Coolant Reservoir Cap (Part No.10257)
from
$12.99
Manufactured to meet all OEM specifications. Designed to be easy to install and remove. Manufactured from high quality components with proper relief and vacuum valves. Quality tested to stand up to even the most demanding automotive cooling systems.
Product Features:
See More
Product Features:
- Maintains proper cooling system pressure
- Easy installation and removal
- 100% tested to ensure proper pressure and longevity
- Meets all OEM specifications
Dorman – Help – Engine Coolant Reservoir Cap: Flip Top, Plastic, 1 Pack (Part No.82601)
from
$15.99
Cracked or lost the original engine coolant reservoir cap? Replace it seamlessly and effectively with this precisely engineered, direct replacement cap.
Product Features:
See More
Product Features:
- Direct replacement – this engine coolant reservoir cap directly replaces a cracked or lost original cap
- Application specific – made to match dimensions of reservoir cap on only certain vehicle years, makes and models
- Seamless fit – reverse-engineered from the original equipment to fit perfectly
- Excellent value – a quick, easy replacement that’s less expensive than going back to the dealership
Dorman – HD Solutions – Engine Coolant Reservoir Cap: Twist, Plastic, 1 Pack (Part No.902-5601)
from
$23.79
Cracked or lost the original engine coolant reservoir cap? Replace it seamlessly and effectively with this precisely engineered, direct replacement cap.
Product Features:
See More
Product Features:
- Direct replacement – this engine coolant reservoir cap directly replaces a cracked or lost original cap
- Application specific – made to match dimensions of reservoir cap on only certain vehicle years, makes and models
- Seamless fit – reverse-engineered from the original equipment to fit perfectly
- Excellent value – a quick, easy replacement that’s less expensive than going back to the dealership
Dorman – Help – Engine Coolant Reservoir Cap: Twist, Plastic, 1 Pack (Part No.54216)
from
$22.99
Cracked or lost the original engine coolant reservoir cap? Replace it seamlessly and effectively with this precisely engineered, direct replacement cap.
Product Features:
See More
Product Features:
- Direct replacement – this engine coolant reservoir cap directly replaces a cracked or lost original cap
- Application specific – made to match dimensions of reservoir cap on only certain vehicle years, makes and models
- Seamless fit – reverse-engineered from the original equipment to fit perfectly
- Excellent value – a quick, easy replacement that’s less expensive than going back to the dealership
Carquest Premium – Engine Coolant Reservoir Cap (Part No.10240)
from
$5.99
Manufactured to meet all OEM specifications. Designed to be easy to install and remove. Manufactured from high quality components with proper relief and vacuum valves. Quality tested to stand up to even the most demanding automotive cooling systems.
Product Features:
See More
Product Features:
- Maintains proper cooling system pressure
- Easy installation and removal
- 100% tested to ensure proper pressure and longevity
- Meets all OEM specifications
Dorman – Help – Engine Coolant Reservoir Cap: Twist, Plastic, 1 Pack (Part No.54222)
from
$24.29
Cracked or lost the original engine coolant reservoir cap? Replace it seamlessly and effectively with this precisely engineered, direct replacement cap.
Product Features:
See More
Product Features:
- Direct replacement – this engine coolant reservoir cap directly replaces a cracked or lost original cap
- Application specific – made to match dimensions of reservoir cap on only certain vehicle years, makes and models
- Seamless fit – reverse-engineered from the original equipment to fit perfectly
- Excellent value – a quick, easy replacement that’s less expensive than going back to the dealership
Dorman – Help – Engine Coolant Reservoir Cap: Twist, Plastic, 1 Pack (Part No.82596)
from
$5.99
Cracked or lost the original engine coolant reservoir cap? Replace it seamlessly and effectively with this precisely engineered, direct replacement cap.
Product Features:
See More
Product Features:
- Direct replacement – this engine coolant reservoir cap directly replaces a cracked or lost original cap
- Application specific – made to match dimensions of reservoir cap on only certain vehicle years, makes and models
- Seamless fit – reverse-engineered from the original equipment to fit perfectly
- Excellent value – a quick, easy replacement that’s less expensive than going back to the dealership
ACDelco – Expansion Tank Cap (Part No.G1040202900ACD)
from
$21.45
Expansion Tank Cap
ACDelco – GM Original Equipment Expansion Tank Cap (Part No.G1040210791ACD)
from
$21.23
An ACDelco GM Original Equipment Expansion Tank Cap is a spring loaded cap that seals the radiator filler neck or surge tank, and is a GM-recommended replacement for your vehicle’s original component. It maintains pressure on the cooling system while the engine is operating, which raises the boiling point of the engine coolant. It also replenishes the system with coolant from the expansion tank (if equipped) when the engine cools off. This original equipment radiator cap has been manufactured to fit your specific GM vehicle, providing the same performance, durability, and service life you expect from General Motors. Get the GM quality you know and trust with ACDelco GM Original Equipment Thermostats and Caps. Stay with the brand of parts your General Motors vehicle came with and get peace of mind that the fit, form, and function is up to the high standards and specifications of General Motors. ACDelco GM Original Equipment Thermostats and Caps are engineered for virtually every model of GM car, light duty truck, and sport utility vehicle.
Product Features:
See More
Product Features:
- Seal and maintain pressure on the cooling system for vehicle safety
- Raise the boiling point of the engine coolant to maintain efficiency
- Fit most models of GM vehicles for expanded coverage
- GM-recommended replacement part for your GM vehicle’s original factory component
- Offering the quality, reliability, and durability of GM OE
- Manufactured to GM OE specification for fit, form, and function
ACDelco – GM Original Equipment Expansion Tank Cap (Part No.G1040468277ACD)
from
$12.31
An ACDelco GM Original Equipment Expansion Tank Cap is a spring loaded cap that seals the radiator filler neck or surge tank, and is a GM-recommended replacement for your vehicle’s original component. It maintains pressure on the cooling system while the engine is operating, which raises the boiling point of the engine coolant. It also replenishes the system with coolant from the expansion tank (if equipped) when the engine cools off. This original equipment radiator cap has been manufactured to fit your specific GM vehicle, providing the same performance, durability, and service life you expect from General Motors. Get the GM quality you know and trust with ACDelco GM Original Equipment Thermostats and Caps. Stay with the brand of parts your General Motors vehicle came with and get peace of mind that the fit, form, and function is up to the high standards and specifications of General Motors. ACDelco GM Original Equipment Thermostats and Caps are engineered for virtually every model of GM car, light duty truck, and sport utility vehicle.
Product Features:
See More
Product Features:
- Seal and maintain pressure on the cooling system for vehicle safety
- Raise the boiling point of the engine coolant to maintain efficiency
- Fit most models of GM vehicles for expanded coverage
- GM-recommended replacement part for your GM vehicle’s original factory component
- Offering the quality, reliability, and durability of GM OE
- Manufactured to GM OE specification for fit, form, and function
Dorman – Dorman Expansion Tank Cap (Part No.G1040308133DOR)
from
$7.91
Dorman offers a variety of Engine Coolant Recovery Tank Caps for a range of applications. All Dorman Engine Coolant Recovery Tank Caps are constructed of high-quality plastic. They effectively protect the cooling system by providing a tight seal against the elements.
Product Features:
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Product Features:
- Save time, money and labor by replacing only the Cap – instead of the entire Engine Coolant Recovery Tank
- Direct replacement for a proper fit every time
- A necessary safety item – prevents coolant from splashing and/or leaking
- Available in diverse styles, including screw-on and snap-on
FAQs for Cadillac CT6 Coolant Reservoir Caps
What are the most popular Coolant Reservoir Caps for the Cadillac CT6?
With 3 brands you can trust, our most popular Coolant Reservoir Caps for the Cadillac CT6 are:
from
$16.99
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Engine Coolant Reservoir Cap: Twist, Plastic, 1 Pack
Coolant Reservoir Caps
Find Your Cadillac CT6 Coolant Reservoir Caps by Year
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