Is this the block heater cable? : r/MechanicAdvice
How to Install a Block Heater | Advance Auto Parts
Amazon.com: Silicone Heating Pad, 2 x 5inch Car Universal Oil Pan Heater 50W Battery Heater Pad 120V Engine Block Heater Pad with 68Inch Long Power Cord : Automotive
Block Heater Cord 3600008 Accessory, Professional Spare Parts Elv70-0280 Heavy Duty Durable Replacement Cordset Cord for 7.3L 6.0L 6.7L - Walmart.ca