Run your business with confidence and control.
Fusion unifies your entire operation in a flexible business system tailored to the way you work. Rigorous controls, real-time visibility, and industry-leading integrations keep everything visible and aligned as you grow.
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You’re in good company with Karmak.




Fusion is the core business engine that shows commercial vehicle organizations what they’ve been missing.
It runs every corner of your operation, giving leaders a complete and accurate view of the business at every level.
Work the way you want, and win.
Fusion adapts to the way your business works, no matter the size or structure.
Each business is unique. Fusion delivers tailored solutions for the entire commercial transportation ecosystem.
The enterprise system of record that adapts to your business.
Uncover operational gaps and eliminate them to gain more speed, accuracy, and margin protection.
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Maximize profits and tighten inventory control.
Empower your team with real-time visibility into lost sales and inventory trends while enforcing pricing structures that protect your margins.
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Drive shop throughput and technician efficiency.
Digitally untether your team to speed up repair cycles, improve accuracy, and turn bays faster.
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Protect your margins with proven financial integrity.
Centralize every transaction in a single ledger that enforces strict controls and audit-ready accuracy.
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Sell with confidence by knowing true unit costs.
Eliminate blind spots with real-time visibility into maintenance costs and inventory across the entire sales lifecycle.
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Maximize utilization and automate complex billing.
Streamline tracking, insurance, and billing adjustments to keep your rental assets moving and profitable.
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Build trust and speed with a modern digital experience.
Close the communication gap with video walk-arounds and branded apps that speed up approvals.
More than 30 integrations.
Connect to the systems that keep your business moving — from OEM workflows to credit card processing, ecommerce, analytics, CRMs, and mobile tools that extend your operation.








Karmak Mobile Service, fully integrated with Fusion.
Built for truck dealers, fleet service providers, and repair shops, Karmak Mobile Service extends the Fusion business system into the field. Technicians, service advisors, and managers can access and update repair orders from iOS and Android devices, with real-time synchronization that reduces duplicate entry, improves accuracy, and keeps service operations aligned wherever work happens.

Eliminate errors, speed up jobs, and unlock higher service throughput.
Create and update repair orders in real time with live Fusion data, powerful search, and barcode scanning that reduce errors and keep jobs moving faster.

Protect your margins with role-based, error-proof controls.
Maintain financial integrity and operational discipline by enforcing Fusion’s granular user group permissions on every mobile device.





Boost tech efficiency and capture more billable minutes.
Keep technicians focused on the repair — not the terminal — by enabling them to clock on tasks, add parts, and dictate stories directly from the bay.

Reduce training time and drive faster adoption across the shop floor.
Empower your team with an intuitive app available on iOS and Android that adapts to user preferences like language and display modes.
Employee owned and operated.
When everyone is an owner, you work with people who take responsibility for your challenges as if they were their own.
Replace information gaps with clarity and operational control.
Traditional systems create information gaps that slow work, hide issues, and increase costs. Fusion replaces those gaps with real-time visibility and operational consistency that helps teams move faster and make better decisions.




Built in the bay, not the boardroom.
Four decades of firsthand experience in parts departments, service bays, and mission-critical operations shape everything we build.
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Make a seamless transition to Fusion.
Fusion implementations are designed to reduce risk, shorten ramp-up time, and support your team at every step.
Data Migration and Validation
Your transition begins with a careful migration of customers, units, parts, repair order history, and accounting records into Fusion. We guide cleanup, mapping, and test conversions so you start with accurate, trusted data.
Configuration Tailored to Your Needs
Rather than forcing generic workflows, we configure Fusion to reflect how you actually operate. Locations, OEM programs, roles, permissions, integrations, and reporting align to your business structure from day one.
Hands-on Training for Every Role
Each team trains on real workflows in a dedicated test environment. Through a mix of eLearning, live sessions, and teachbacks, your teams build confidence before go-live.
Go-Live Support
When launch day arrives, our trainers work alongside your team onsite, remotely, or both. We answer questions in real time, resolve issues quickly, and help operations run smoothly.
Ongoing Success and Optimization
After launch, the focus shifts to continuous improvement. We partner with you to fine-tune workflows, optimize reporting, and introduce new Fusion capabilities as your needs evolve.
From migration through optimization, every step follows a structured, guided approach. Your team ramps up with clarity, confidence, and far less stress.
Real people. Real results. Real partnership.
Join more than 4,000 rooftops that choose Karmak as the partner they can count on to help with day-to-day operations, unexpected challenges, crunch times, and everything in between.
FAQs
Fusion is the industry’s leading dealer management system (DMS) designed specifically for the heavy-duty trucking and commercial transportation sector. It serves as your central system of record, unifying accounting, parts, service, sales, and lease/rental operations into one robust platform.
Fusion is built for large, multi-location dealership enterprises, independent service providers, and parts distributors who require depth and scalability. It is designed to handle complex operations across OEM and independent networks (Freightliner, Peterbilt, Kenworth, International, Mack/Volvo, and more).
Unlike rigid systems that force you to adapt your business to their software, Fusion adapts to you. It offers deep configurability that allows you to "work the way you want," tailoring workflows and reports to fit your specific operational needs. Additionally, Fusion enforces rigorous checks and balances to ensure financial integrity and protect your margins.
Yes. Fusion is widely recognized for having the strongest parts management system in the industry. Its pricing controls allow you to manage pricing at the individual customer level, ensuring you maximize margins while maintaining flexibility for specific client relationships.
Absolutely. Through our Unity and Unity Pro API platform, Fusion integrates with over 30 OEM, finance, telematics, and productivity partners. The system handles over 25 million API calls per month, ensuring real-time, bi-directional data flow between Fusion and third-party applications.
It is more accurately described as a comprehensive business management system or "system of record." While it serves dealers, it is also designed for warehouse distributors, lease/rental companies, and independent service shops. It acts as the "nucleus" of your operation, unifying accounting, parts, service, sales, and lease/rental into one connected platform.
Fusion utilizes a robust system of user group permissions and checks and balances. Unlike competitors that may allow users to override data easily (creating accounting nightmares), Fusion allows you to lock down specific actions—such as limiting the discount percentage a counter person can offer or preventing unauthorized changes to repair orders. This ensures financial integrity and stops profit leaks before they happen.
Yes. Fusion is highly configurable. Rather than forcing you into a rigid workflow, it offers deep customization options—from complex parts pricing matrices to specific service workflows—so the system molds to your business needs rather than the other way around.
Yes. Fusion allows you to attach documents, photos, and files directly to repair orders, parts invoices, and deal packets. This capability streamlines operations, reduces physical paperwork, and ensures that all relevant information is stored centrally within the transaction record.
You can count on Karmak for relationship-first support. Our support team is U.S.-based and comprised of product experts who understand your business, with an average phone response time of 18 seconds.
Get ready to see your
business clearly.
No pressure. No commitment. Just a straightforward way to determine whether Karmak is the right fit for your operation.







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