Branch Automotive — Denver's Diesel Repair Shop in Littleton & Highlands Ranch
We Are
TRUE Diesel
Specialists
HIGH QUALITY
PARTS & WORK
24 MO/24K MI
WARRANTY
DIAGNOSTIC
INSPECTIONS
TRUSTWORTHY
& FRIENDLY SERVICE
Your Trusted, Local Diesel Repair &
Maintenance Shop
Branch Automotive is a comprehensive diesel repair and service center in Littleton, CO.
We are a local, family-owned auto and truck repair shop servicing light-duty and all-wheel drive diesel vehicles, and one of the few diesel emission testing facilities certified by the state of Colorado.
We stand behind all our work because it is backed by over 80 years of combined experience—rest assured that your vehicle is in great hands!
Come by and visit our clean, professional shop to experience our exceptional customer service for yourself.
Repairs & Maintenance Services We Offer at Branch Automotive
Diesel Truck Repair and Maintenance Services in Denver, CO
Branch Automotive is the Denver metro area’s trusted diesel truck repair specialist. Located in Littleton, CO on County Line Road, we serve diesel truck owners from Denver, Colorado and surrounding communities including Highlands Ranch, Centennial, Parker, and Englewood — all within easy driving distance of our shop.
From routine diesel maintenance to complex diesel engine services, our team handles every repair with factory-level diagnostics and ASE-certified expertise. We specialize in diesel truck repair for light-duty and heavy-duty trucks, including Duramax, Cummins, and Power Stroke engines. Whether you need a diesel tune-up, a turbo replacement, or a full engine overhaul, we have the tools, training, and experience to do it right the first time.
We also offer top-tier repair services for fleets. If you manage commercial trucks and need a dependable diesel repair partner in the Denver, Colorado area, Branch Automotive is the diesel repair shop Denver fleet operators trust.
Commercial Truck and Fleet Repair Services
Branch Automotive provides dedicated fleet services for businesses that depend on commercial trucks and work vehicles throughout the Denver metro area. Whether you operate a fleet of five diesel trucks or a full commercial fleet, keeping your vehicles on the road is critical to your operation. Downtime costs money — and we understand that.
Our fleet repair and fleet maintenance programs are designed to minimize disruption. We offer priority scheduling, thorough multi-point inspections, and detailed service records for every vehicle in your fleet. Our diesel technicians are trained to handle the full range of commercial truck repairs — from semi-truck repair and brake service to diesel transmission work and DPF cleaning.
We also provide breakdown services for diesel trucks that cannot make it to the shop under their own power. If you need reliable fleet services from a diesel repair shop in Denver that truly specializes in heavy-duty and light-duty diesel trucks, call Branch Automotive today to get a quote and set up a fleet maintenance plan.
Why Denver Diesel Owners Trust Branch Automotive
There are plenty of auto shops in the Denver area, but very few genuinely specialize in diesel. Branch Automotive is not a general repair shop that occasionally sees a diesel truck — we are a diesel-first shop with over 20 years of experience and a team that includes ASE Master Technicians, an ASE World Class Technician, and multiple techs with Ford and GM factory training.
We are also one of only a few State of Colorado-certified diesel emissions testing facilities serving the Denver metro, which means diesel owners from Denver, Littleton, Highlands Ranch, Parker, and even further afield choose our shop when their truck needs emissions diagnostics or repair services.
Most repairs come with a nationwide warranty. Our shop is a NAPA Auto Care Center. We use factory-level scan tools and offer digital vehicle inspections with photos sent directly to your phone. If you are looking for the best diesel repair shop Denver has to offer — for performance, for trust, and for value — Branch Automotive is your answer. Call (303) 771-2224 or schedule online.
Diesel Repair by True Experts
Diesel engines are very reliable. But they still need regular maintenance and, sometimes, repairs.
Branch Automotive in Littleton, CO provides diesel repair services for individuals and businesses. Our diesel repair specialist shop has several auto techs with ASE Certifications, including four Master Techs, an ASE World Class Technician, and multiple technicians with Ford and GM factory training in diesel repair.
Branch Automotive is your go-to diesel shop in Littleton, CO when you need diesel repair service or maintenance.
Contact us at (303) 771-2224 or visit us at 6030 East County Line Road, Littleton, CO 80126.
Common Diesel Issues
• Leaky gaskets
• Overheating
• Dirty injectors
• Air and oil filtration issues
• Faulty injection timers
• Piston scoring
• Fuel system restriction
• Hard starting
Areas We Service
Colorado requires emissions testing on diesel vehicles once the vehicle reaches four years old. Diesel owners bring their diesel vehicles to our auto repair shop in Littleton, CO since we are one of the few diesel emission testing facilities certified by the State of Colorado.
While we are located in Littleton, CO, we also service diesel vehicles from Highlands Ranch, Centennial, Cherry Hills, Lonetree, Parker, Castle Rock, Greenwood Village, and Lakewood.
Most people drop their vehicles off at our shop in Littleton, CO. But if you have to wait, we have free Wi-Fi, amazingly clean bathrooms, and a coffee bar with coffee, tea, water, and hot chocolate.
Contact Branch Automotive in Littleton, CO
Contact Branch Automotive at (303) 771-2224 to schedule an appointment for emissions testing, maintenance, or repair. We are conveniently located at 6030 East County Line Road, Littleton, CO 80126.
• 24 MONTH / 24,000 MILE WARRANTY
• DIAGNOSTIC INSPECTIONS
• DIESEL EMISSIONS TESTING