NEW OEM General Motors Solid machined Brass and Chrome polished Block Heater for 2019 and newer Chevy & GMC trucks and SUV's with the 6.6L Duramax engine GM Part# 12724955, with factory cord that includes heat sheilding, grommets to secure cord to factory attachment locations and zip-ties to hold cord in place. Factory GM 400 watt heater This assembly has been on back-order through the dealer network for a long time.... but we have them. Made with a high quality flexible rubber sheathing (not a cheap plastic covering that cracks in the cold) Plug ends are molded into cord, not just glued on to it like products of lesser quality. Keeps moisture out. Block and pad heaters have the longest life and consume considerably less electricity when used in conjunction with a controller such as the Power Badger