When your diesel truck is more than just a vehicle—when it’s your livelihood, your weekend warrior, or your trusted workhorse—you don’t take chances with repairs. You look for a diesel service shop that understands not just diesel engines but also the responsibility of keeping your truck safe, efficient, and powerful. That’s why diesel truck owners throughout Littleton and Highlands Ranch, CO, trust Branch Automotive. With a team of ASE Master Diesel Technicians, factory-trained experts, and almost 16 years of community service, we provide the kind of expertise and honesty that diesel drivers count on.
Why Experience and Certifications Matter
Nearly 16 Years Serving Littleton Diesel Drivers
Branch Automotive isn’t a big-box chain or a jack-of-all-trades auto shop. We are a locally-owned, family-run diesel repair and service center with deep roots in the community. For nearly two decades, our team has delivered trustworthy, reliable diesel repairs to truck owners across Littleton, Highlands Ranch, and the greater Denver metro area.
From fleet managers to weekend campers, thousands of diesel owners have trusted us with their vehicles. Why? Because we’ve earned that trust with every repair, every oil change, every honest diagnostic.
As we like to say: We treat every vehicle like we’re about to put our mothers (whom we love) in them.
Skilled, Certified, and Specialized Technicians
When you bring your truck to Branch Automotive, you’re not leaving it with generalists. Our staff includes:
- ASE Master Diesel Technicians
- A World-Class ASE Certified Mechanic
- Multiple team members with Ford and GM factory training
What sets us apart isn’t just our diesel training—it’s what we do with it. We’ve built a reputation for solving complex diesel problems that many other shops can’t diagnose. That’s why so many diesel owners in Littleton and Highlands Ranch turn to us for advanced diagnostics and honest answers.
Our Diesel Repair Capabilities
Cummins, Duramax, and Powerstroke Experts
At Branch Automotive, we specialize in the “Big Three” of diesel engines: Cummins, Duramax, and Powerstroke. Whether you’re towing heavy loads, managing a fleet, or simply want to keep your truck in peak condition, we offer diagnostics and repairs tailored to the unique demands of each engine type.
Our expertise covers everything from high-pressure fuel systems to turbochargers, DPF systems, emissions diagnostics, and more. We don’t just read codes—we interpret symptoms and uncover root causes.
Factory-Level Diagnostic Equipment
We use OEM-level diagnostic software and tools, including the same scan tools used by Ford, GM, and Dodge dealers. That means you’re getting dealership-level accuracy with the personalized service of a local shop.
This also enables us to perform manufacturer-specific functions and system calibrations, offering a level of precision many shops simply can’t match.
In-House Chassis Dynamometer Testing
We’re proud to be one of the only independent diesel shops in the state with a chassis dynamometer. This equipment allows us to simulate real-world driving conditions and catch intermittent performance issues that are hard to replicate in a static environment.
It’s a game-changer for diagnosing power loss, driveability concerns, or emissions system problems—and one more reason diesel owners in Littleton trust us for complex diagnostics.
| Feature | Dealership Service Centers | Branch Automotive, Littleton, CO |
|---|---|---|
| Technician Expertise | General diesel techs, often rotating | ASE Master Diesel Techs with factory training |
| Diagnostic Tools | OEM scan tools | OEM scan tools + in-house dyno testing |
| Wait Times | Long lead times, especially for diagnostics | Fast turnaround with in-house diagnostics |
| Service Transparency | Limited communication | Digital inspections with photos and videos |
| Parts Quality | OEM parts | OEM or OE-equivalent parts only |
| Warranty | 12-month / 12,000-mile (typical) | 36-month / 36,000-mile nationwide |
| Customer Service | Transactional, volume-based | Relationship-first, family-run business |
| Fleet Service Support | Rare or limited | Available for small & midsize fleets |
| Location Accessibility | Spread across Denver Metro | Convenient to Littleton & Highlands Ranch |
Proactive Maintenance: The Key to Diesel Reliability
Why Waiting on Maintenance Costs More
Diesel trucks are built for power and endurance—but only when they’re properly maintained. One of the most important messages we share with our customers is this: delaying maintenance turns small problems into big repairs.
From fluid changes to filtration, today’s diesel trucks are engineered with tight tolerances and emissions-sensitive systems that don’t tolerate neglect.
Our Diesel Maintenance Services Include:
- Oil changes every 5,000 miles
- Transmission flush and filter replacement
- Differential fluid service
- Air and fuel filter maintenance
- Brake inspection and alignment
- Tire rotation and replacement
- Cooling system service
- OEM parts installation for long-term reliability
We strongly discourage modifications like cold air intakes, tuners, and aftermarket emissions deletes. These mods often reduce reliability and can lead to costly failures—especially on trucks still under emissions regulations.
FAQ: How often should I service my diesel engine?
We recommend oil changes every 5,000 miles and a complete system inspection every 10,000 miles or sooner, depending on usage.
FAQ: What parts do you use for repairs?
We exclusively use OEM or OE-equivalent parts. Your truck is an investment—we help protect that investment with quality parts and workmanship.
Colorado Diesel Emissions Testing: We’re Certified
Branch Automotive is one of the few diesel repair shops in Colorado certified to perform state diesel emissions testing. That means you don’t have to bounce between testing centers and repair shops—we handle it all under one roof.
Whether your diesel truck is due for emissions or has already failed, we can test, diagnose, and repair your vehicle for compliance.
FAQ: What if my truck fails emissions?
We provide a full diagnostic to determine the issue, complete the necessary repairs, and retest to ensure your vehicle passes—all right here in Littleton.
Ready for a Trusted Diesel Specialist Near Highlands Ranch or Littleton?
Whether your truck needs maintenance, emissions testing, or advanced diagnostics, the expert team at Branch Automotive is here to help—with no shortcuts and no compromises. Schedule your appointment today.
The Branch Automotive Philosophy
We’ve built Branch Automotive on a core set of principles that guide every interaction:
Better Value
Great service begins with clear communication and honest work. From accurate diagnostics to transparent pricing, we make sure our clients feel informed and respected every step of the way.
Better Industry
We believe in elevating our industry by refusing to be mediocre. No cutting corners. No rushed repairs. Just high-quality work performed by passionate technicians.
Better Life
We want better lives for our staff and our customers. That means fair wages, a positive work environment, and providing reliable transportation that helps our customers live their lives without vehicle stress.
Backed by Nationwide Warranty & NAPA Affiliation
Most repairs performed at Branch Automotive come with a nationwide warranty, giving you peace of mind whether you’re traveling across Colorado or heading out of state.
As a proud NAPA Auto Care Center, we meet rigorous quality standards and are part of a national network of trusted repair professionals.
Serving Littleton, Highlands Ranch, and Beyond
Our central location near Highlands Ranch, CO, makes us easily accessible to diesel owners from across the South Denver metro area. Whether you’re coming in for routine maintenance or troubleshooting a tricky issue, we’ll treat your truck—and your time—with the respect it deserves.
Schedule Your Diesel Service Appointment Today
If you’re searching for diesel repair in Littleton, CO, or surrounding areas like Highlands Ranch, Branch Automotive is your trusted diesel truck specialist. We bring dealership-level training, advanced diagnostic tools, and a customer-first attitude to every job.
At Branch Automotive, we’re true diesel specialists.
Visit us at: 6030 E County Line Road, Littleton, CO 80126
Call us: (303) 771-2224
Book online:
branchautomotive.com
