Zerostart 3100059 Freeze Plug Engine Block Heater for Chevrolet, GMC, 1-5/8-Inch Diameter | CSA Approved | 120 Volts | 1000 Watts Ensure quick winter starts and reduce engine wear For Chevrolet, GMC. See Zerostart catalog for specific applications. 1-5/8-Inch Diameter 5' cord included Volts: 120 | Watts: 1000 | Plug Type: 120 Volt, 15 Amp (Type A)