Branch Automotive - Trusted Diesel Repair in Littleton, CO. Visit Branch Automotive in Littleton, CO, for top-notch Cummins, Duramax, or Powerstroke diesel engine repairs. Our A.S.E. Certified master technicians provide oil changes, brakes, differential repairs, steering & suspension work, tire services, and more. Experience and honesty set us apart. With a GM World Class Master and an A.S.E. World-Class tech with 23 certifications, plus a tech with Ford Factory Training in diesel, we deliver exceptional service.