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We Buy & Sell Industrial Generators

Established 1981



Generator Service Available in Colorado

In addition to sales and rentals, Diesel Service & Supply / Generator Source offers a wide range of professional generator services throughout the state of Colorado. Our fleet of service trucks, a staff of trained power generation technicians, and a 35-year history of specializing in commercial and industrial power generation allow us to provide comprehensive services and solutions to all our local customers.

Generator Services ProvidedLoad Bank Testing a Cummins Generator

We offer in-house generator drop-off and pickup (at our 14-acre facility in Brighton, Colorado), plus on-site full-service power generation technicians in pre-stocked service trucks to efficiently meet all customer requirements. 

Our generator services include:
  • Preventative Maintenance - Performing both mechanical and electrical tasks/inspections on a regular interval exponentially reduces the possibility of failure from improperly maintained or neglected equipment.
  • Generator Repair - Troubleshooting is the first step to any repair. Once the failed component is isolated, the cause of the failure must be determined and corrected. Once the total repair is completed, we test the system to ensure readiness on demand. For convenience, we provide quick drop-offs at our facility for things like food trucks, tour buses, third-party rental generators, and other mobile power equipment.
  • Load Bank Testing - These tests simulate a load to the generator without placing it online. Most critical systems require this test to be completed on a regular schedule. Some repair tasks require the generator to be loaded to ensure the repair corrected the issue. This can be considered a Repair or Maintenance task depending on the situation. We offer mobile Resistive, Reactive, and Combination-style load bank testing options.
  • Accessories - Ancillary equipment and systems of any style that aid in the supply of generated power includes Automatic Transfer Switch (ATS), switching, and control systems alarm and warning systems. As an ASCO reseller, we also provide sales of switches as needed.
  • Parts - These are commonly stocked maintenance and standard repair parts for most generators such as filters, oil, cabling, and more.
  • Annual Agreements & Service Contracts - In addition to single repair options we also provide hassle-free, rate locking annual service agreements.
  • Power Systems Consulting - From design to site planning and installation, and more.
  • Installation and De-Commisioning - We can remove old generators and/or help install new ones.Row of Generator Service Trucks
  • Temporary Mobile Rental Power Options - For mission-critical customers, we can provide temporary power while providing on-site service.
  • 24/7 Emergency Service Available - For mission-critical customers with special requirements. 
CALL 720-943-0537 or use our GENERATOR SERVICE REQUEST FORM to get more information.

To see a few examples of recent projects we have completed, also be sure to visit our Colorado Generator Service Project Profiles section for a summary of services provided and pictures of our generator technicians in action. Customer references also available on request.

Diesel Service & Supply has provided services to businesses of all types throughout the Denver Metro area and far beyond, reaching down to Colorado Springs and Pueblo. Projects include local municipalities, property management firms, water storage and treatment facilities, telecom companies, dairy farms, agricultural grow houses, oilfield facilities, healthcare providers, hospitals, mission-critical data centers, and many more! View the complete list of our current Service Areas here.

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We Buy Used & Surplus Generators!

Get $$$ for your used power generation equipment