Harnish Group Inc. is the Caterpillar Dealer in central and western Washington, central and eastern Montana, northwestern Wyoming, northwestern North Dakota and the state of Alaska. Our Member Companies are N C Machinery Co., NC The Cat Rental Store, N C Power Systems Co., Tractor & Equipment Co., T&E The Cat Rental Store, T&E Power Systems, and SITECH Northwest Inc., representing Caterpillar, and other manufacturers.