Welcome to Coops Diesel Service! Located in Greeley, Colorado, we have been in business since 2007 with over 20 years of experience with diesel engines. Coop started cranking wrenches in 1995 with the US Army and was Caterpillar certified in 2001 and has numerous other certifications. Not only do we operate a full service shop but are equipped with a mobile service truck for 24 hour emergency services. We are able to go as far as needed to assist our customers.