84564686 Engine Block Coolant Heater Cable Replacement Cord Compatible with 2019–2023 Silverado 1500/LD/LTD, 2020–2024 HD Duramax Trucks

Package Includes: 1 × Engine Coolant Heater Power Cable (OEM Replacement for Part #84564686) Material: Outer Jacket: Heavy-duty, cold-resistant SJOOW rubber – remains flexible down to -40°F/C Conductors: 16 AWG stranded copper wires with high-temp insulation Plug & Connector: Reinforced thermoplastic housing with secure locking tabs Terminals: Corrosion-resistant brass contacts with strain relief boot Color: Black cable with gray or black molded connector Dimensions & Specifications: Cable Length: Approx. 6 feet (1.8 meters) – standard OEM length for under-hood routing Voltage Rating:120V AC, 60Hz (standard North American household outlet) Current Rating:15A max Operating Temperature Range:-40°C to +105°C (-40°F to 221°F) Connector Type: Direct-fit plug for GM factory-installed engine block coolant heaters Features: Exact OEM Replacement – Matches original equipment part number 84564686 in fit, function, and durability Cold-Weather Optimized – Specially engineered jacket stays pliable in extreme winter conditions Plug-and-Play Installation – No wiring, splicing, or tools required—just snap into your existing block heater Strain Relief & Locking Design – Prevents accidental disconnection from engine vibration

• Genuine OE Replacement for Reliable Cold-Weather Starts：This coolant heater cable is a direct replacement for GM OEM part #84564686, designed specifically for 2019–2023 Silverado 1500/LD/LTD, 2020–2024 HD Duramax Trucks. It connects seamlessly to your factory-installed engine block heater, delivering consistent pre-warming performance so your engine starts smoothly—even at -30°F
• Engineered for Extreme Winter Conditions：Crafted with SJOOW-grade cold-weather rubber, this cable remains flexible and crack-resistant in temperatures as low as -40°F—a critical feature often missing in cheap alternatives. The thick insulation protects internal 16 AWG copper conductors from abrasion, oil, and road debris, while the reinforced strain relief boot prevents wire fatigue at the connector junction
• Simple, Tool-Free Installation in Seconds：No electrician needed! Just unplug your old or damaged cord and snap this replacement directly onto your existing block heater located on the engine block. The design matches GM’s original locking mechanism, so it won’t vibrate loose during transit. The 6-foot length provides ample reach to route through the grille or wheel well to a standard 120V outlet
• Comprehensive Compatibility Across GM Lineup：One cable fits dozens of models: Silverado 1500 (2019–2023), Silverado 2500/3500 HD Duramax (2020–2024) If your GM vehicle came with a factory block heater port (common in northern states and Canada), this cord is almost certainly compatible. Always verify your VIN or check for the threaded heater port near the oil filter before purchase
• Protect Your Engine and Save on Fuel & Repairs：Using a block heater reduces startup friction, lowers emissions, and cuts fuel consumption by up to 10–15% during cold starts. This OEM-spec cable ensures your heater operates at full efficiency—unlike frayed, brittle, or undersized aftermarket cords that overheat or fail. By maintaining proper coolant temperature overnight, you also prevent cylinder wear, turbo stress, and battery drain