Arkansas Valley Diesel Service, Inc. has a strong 35+ year history in Southeastern Colorado and the tri-state region. Founded by Gene La Cost in 1982, Arkansas Valley Diesel has grown into the only first rate parts & service facility in the region with strong parts & service partnerships. As long standing authorized dealers for Detroit Diesel and Cummins engine parts & service, Arkansas Valley Diesel added Navistar/International to it’s list of authorized dealerships in early 2014. It joins Freightliner/Western Star/Sterling, Peterbilt and Mack for authorized dealership agreements. Arkansas Valley Diesel Service, Inc. is proud to be your one stop shop for EVERYTHING heavy duty! AVDS, Inc. is proud to announce the Onan Power Generation line to our large family of dealerships. With the outstanding support of Cummins Engine Company, Onan is the first name in worldwide power generation. With factory trained parts & service technicians, our dealership is positioned strategically between Denver, CO and Amarillo, TX to handle all of your Onan Power Generation Needs. Call us today.