EVIL ENERGY Upper Radiator Hose Kit for 2017-2019 L5P Duramax 6.6L, Aluminum Upper Radiator Coolant Hose Replacement Upgrade

Q: What is this upper radiator hose designed to replace?
A: This upper radiator hose replaces the factory upper radiator hose assembly on compatible 2017-2019 Chevrolet Silverado 2500 HD/3500 HD and GMC Sierra 2500 HD/3500 HD trucks with the L5P 6.6L Duramax engine. It replaces OEM part number 84094878.

Q: Is this an auto radiator hose or a universal coolant hose for car use?
A: This is a vehicle-specific auto radiator hose, not a universal coolant hose for car application. It is made for listed Chevrolet Silverado and GMC Sierra L5P Duramax models only.

Q: Does this fit a Chevy Silverado?
A: Yes. This chevy radiator hose fits 2017-2019 Chevrolet Silverado 2500 HD/3500 HD with the L5P 6.6L Duramax engine. It can be used as a chevy silverado coolant hose replacement when the vehicle matches OEM part number 84094878.

Q: Does this fit a GMC Sierra?
A: Yes. This Sierra radiator hose fits 2017-2019 GMC Sierra 2500 HD/3500 HD with the L5P 6.6L Duramax engine. Always confirm year, model, engine, and OEM number before ordering.

Q: Is this an L5P Duramax radiator hose?
A: Yes. This is an L5P Duramax radiator hose for 2017-2019 Silverado and Sierra 2500 HD/3500 HD models with the 6.6L L5P Duramax engine.

Q: Are silicone radiator hoses any good?
A: Yes, a quality silicone radiator hose can be good for cooling system connections when it is used in the correct application. Silicone is commonly valued for heat resistance, aging resistance, and flexibility. This kit uses reinforced 5-ply silicone couplers with an aluminum coolant pipe, so it is not just a soft universal hose.

Q: Can silicone hoses be used for radiator hoses?
A: Yes, silicone hoses can be used for radiator hose connections when they are designed for coolant use. This product uses 5-ply silicone radiator hose couplers as part of an upper radiator hose kit. Do not confuse silicone coolant hose with fuel hose, oil hose, heater hose, or EGR hose.

Q: What are the disadvantages of silicone hoses?
A: Common concerns discussed by mechanics and owners include higher cost, possible water vapor permeation over time, the need for proper clamps, and the risk of leaks if the hose is installed with the wrong clamp or poor sealing surface. For this reason, this kit includes reinforced silicone couplers and T-bolt clamps.

Q: Which is better rubber or silicone coolant hoses?
A: Rubber is often preferred for standard OEM daily-driver replacement because it seals well and is cost-effective. Silicone can be better for heat resistance, engine bay styling, and performance-style upgrades. This kit combines an aluminum coolant pipe with reinforced silicone couplers, making it different from a full rubber factory hose.

Q: Why choose aluminum radiator hoses instead of factory rubber hoses?
A: Aluminum radiator hoses or aluminum coolant pipe kits can provide a cleaner, more rigid upper cooling path and a performance-style engine bay look. This product upgrades the factory rubber hose layout with a 6063 aluminum alloy pipe and 5-ply silicone couplers.

Q: Will this upper radiator hose increase horsepower?
A: No. This upper radiator hose is not sold as a horsepower upgrade. Its main value is replacing the factory upper radiator hose assembly with a cleaner aluminum coolant pipe setup that supports the original coolant routing path.

Q: Does this kit require cutting or trimming?
A: No. This L5P Duramax radiator hose kit is designed for direct bolt-on installation along the original coolant routing path. No cutting, trimming, or fabrication is required when used on compatible vehicles.

Q: What is included in the kit?
A: The kit includes 1 mandrel-bent aluminum upper coolant pipe, 2 reinforced 5-ply silicone couplers, and 4 heavy-duty T-bolt clamps.

Q: Can this chevy silverado coolant hose help with towing use?
A: This chevy silverado coolant hose kit is designed for daily driving, towing, diesel performance builds, and long-term ownership. It helps create a secure upper cooling system connection for compatible L5P Duramax trucks.

Q: Can this Sierra radiator hose fix overheating?
A: It can replace a worn, damaged, or leaking factory upper hose assembly, but overheating can also come from the radiator cap, coolant level, thermostat, radiator restriction, water pump, air in the system, or other cooling system issues. Diagnose the full system before assuming the Sierra radiator hose is the only problem.

Q: Why is my upper radiator hose collapsed or flat?
A: Forum discussions often point to cooling system vacuum, a bad coolant reservoir/radiator cap, blocked return/vent lines, coolant leaks, or pressure imbalance. A collapsed upper radiator hose does not always mean the hose itself is the only failed part.

Q: Can I use this as a lower radiator hose?
A: No. This is an upper radiator hose replacement. It is not a lower radiator hose, heater hose, EGR coolant hose, or universal coolant hose.

Q: Is this coolant hose for car buyers looking for coolant fluid?
A: No. This is a physical coolant hose for car cooling-system connection, not coolant liquid, antifreeze, or coolant additive.

Q: How do I confirm fitment before buying this chevy radiator hose?
A: Confirm your vehicle is a 2017-2019 Chevrolet Silverado 2500 HD/3500 HD or GMC Sierra 2500 HD/3500 HD with the L5P 6.6L Duramax engine. Also confirm OEM part number 84094878 before ordering this chevy radiator hose or Sierra version.

Q: Who should buy this L5P Duramax radiator hose kit?
A: It is best for Silverado and Sierra L5P owners replacing OEM 84094878, upgrading from a factory rubber upper hose, building a cleaner engine bay, or maintaining a truck used for towing, daily driving, and long-term diesel ownership.

Sources used for research signals: Reddit discussions on silicone coolant hoses and clamps, r/Duramax upper radiator hose issues, DuramaxDiesels forum discussions on collapsed upper radiator hoses, Gates coolant hose material notes, and MOTOR Magazine hose material guidance.