Diesel Repair Shop Denver, CO | Branch Automotive
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 auto 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
Truck Repair and Maintenance Services in Denver, CO
Branch Automotive is Littleton’s trusted diesel repair specialist for the greater Denver metro area. Located on County Line Road, we serve diesel truck owners from Highlands Ranch, Centennial, Parker, Englewood, and beyond — all within easy driving distance of our shop.
From routine diesel maintenance to complex diesel engine services, our team handles every job with factory-level diagnostics and ASE-certified expertise. We work on everything from light-duty pickups to heavy-duty rigs, including Duramax, Cummins, and Power Stroke engines. Whether you need a 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 your business relies on commercial trucks, Branch Automotive is the dependable diesel partner local fleet operators trust.
Commercial & Fleet Service Solutions
Branch Automotive supports businesses that depend on heavy-duty trucks and work vehicles throughout the metro area. Whether you run five diesel trucks or a full-scale operation, keeping your vehicles on the road is critical to your bottom line. Downtime costs money — and we understand that.
Our maintenance programs are designed to minimize disruption. We offer priority scheduling, thorough multi-point inspections, and detailed service records for every vehicle you operate. Our diesel technicians handle the full range of 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 dependable support, call Branch Automotive today to get a quote and set up a maintenance plan.
Why Denver Diesel Owners Trust Branch Automotive
There are plenty of auto shops nearby, but very few genuinely specialize in diesel. Branch Automotive isn’t a general shop that occasionally sees a diesel truck — we’re a diesel-first team with over 20 years of experience, including ASE Master Technicians, an ASE World Class Technician, and multiple techs with factory training from major OEMs.
We’re also one of only a few State of Colorado-certified diesel emissions testing facilities in the metro area, which means diesel owners from Littleton, Highlands Ranch, Parker, and beyond choose our shop when their vehicle needs emissions testing or service.
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’re looking for the Denver area’s most trusted diesel specialists — 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, diesel repairs.
Branch Automotive in Littleton, CO provides diesel service for individuals and businesses alike. Our specialist shop has several auto techs with ASE Certifications, including four Master Techs, an ASE World Class Technician, and multiple technicians with factory training from major OEMs. We also offer performance upgrades and customization services for diesel enthusiasts who want more from their truck.
Branch Automotive is your go-to shop in Littleton, CO for diesel repair and maintenance.
Contact us at (303) 771-2224 or visit us at 6030 East County Line Road, Littleton, CO 80126.
Common Engine Issues
• Leaky gaskets
• Overheating
• Dirty injectors
• Air and oil filtration issues
• Faulty injection timers
• Piston scoring
• Fuel system restriction
• Hard starting
Areas We Service Near Castle Rock, CO
Colorado requires emissions testing on diesel engines once they reach four years old, and we’re one of the few shops in Littleton, CO certified by the State of Colorado to perform it.
While we’re located in Littleton, CO, we also serve drivers from Highlands Ranch, Centennial, Cherry Hills, Lone Tree, Parker, 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
Frequently Asked Questions
Q1 : How much does a diesel mechanic shop charge per hour?
A: Diesel labor rates vary by shop, region, and the complexity of the repair. Because diesel systems require specialized tools and factory-level diagnostics, rates typically run higher than standard gas-engine service. Contact Branch Automotive for a written estimate before any work begins.
Q2 : Can a regular mechanic work on a diesel engine?
A: Not always. Diesel engines use different fuel delivery, emissions, and diagnostic systems than gasoline engines, so they require technicians with specific diesel training and equipment. Branch Automotive’s team includes ASE Master Technicians and an ASE World Class Technician with diesel-specific factory training.
Q3 : Are diesel repairs expensive?
A: Diesel repair costs depend on the issue — routine maintenance like fuel filter changes is comparable to gas-engine service, while major repairs (turbo, injector, or emissions work) cost more due to specialized parts and labor. Regular maintenance is the best way to avoid costly repairs down the road.
Q4 : How do I find a good diesel mechanic?
A: Look for ASE certification, diesel-specific factory training, transparent digital inspections, and a shop that specializes in diesel rather than treating it as an occasional service. Branch Automotive is a NAPA Auto Care Center with State of Colorado-certified diesel emissions testing.
Q5 : Is there a difference between a diesel mechanic and a diesel technician?
A: The terms are often used interchangeably, though ‘technician’ more precisely reflects the diagnostic, computer-based work modern diesel service requires. Both terms describe someone trained to service diesel engines, fuel systems, and emissions equipment.