Whether you are an owner-operator trying to clear a derate on the shoulder or a twenty-bay fleet shop standardizing on one platform, the right diagnostic setup pays for itself in weeks. We sell the same dealer-level software the franchise dealers use — pre-installed, licensed and activated on rugged laptops — plus every adapter and cable to connect it.
Shop by OEM brand
One hub per manufacturer: coverage tables, software options, required adapters, install guides and the kits that ship ready to work.
Why shops buy from HDS instead of guessing on a marketplace
- Dealer-level, not code-readers. Bi-directional controls, forced DPF regens, injector coding, parameter changes and ECM programming — the functions that actually make money.
- Pre-configured kits. Software installed, licensed, activated and tested on the laptop before it ships. Open the lid and connect.
- Transparent pricing. Hardware, software and first-year updates itemized on every page — the rest of the niche still hides behind “call for price”.
- Technician support. Our support line is staffed by working diesel techs, plus remote diagnostic sessions when you are stuck in the bay.
- Financing. Weekly payments on every kit over $1,000 through our equipment financing program.
Free tools that save you a phone call
Decode a VIN, find the exact connector on your truck, or check scanner compatibility before you buy — no email wall on the basics.
- VIN Decoder — engine, emissions and build data from any commercial VIN.
- Cable Finder — make, model, year in → exact cable SKU out.
- Compatibility Checker — will this scanner work on your truck? Answer in 30 seconds.
- Free diagnostic app — read and clear J1939 faults from your phone before you spend a dollar.
Learn the systems before you buy the tools
Our fault-code library explains SPN/FMI codes by engine family, and the scanner buying guide walks through the exact decision tree we use when a shop calls. Comparing platforms? Read the honest JPRO vs Jaltest vs TEXA matrix — we sell all three, so the comparison is straight.
Best-selling categories
Diesel Diagnostic Laptop Kits
Toughbook kits with OEM software pre-installed, licensed and activated. From owner-operator single-brand to full shop packages.
View details →Heavy Duty Scan Tools
Multi-brand scanners with forced regen, bi-directional controls and parameter programming — no laptop required.
View details →Truck Diagnostic Software
INSITE, DiagnosticLink, DAVIE4, Premium Tech Tool, Cat ET and more — genuine licenses with renewal support.
View details →Adapters & Cables
RP1210/J2534 VCIs, 6-pin and 9-pin Deutsch, OBD-II, DoIP Ethernet and every odd connector in between.
View details →Frequently Asked Questions
What is the best heavy duty truck diagnostic tool for a mixed fleet?
For a mixed Class 3–8 fleet, a multi-brand platform (JPRO, Jaltest CV or TEXA Truck) covers 95% of vehicles with one interface. Add OEM software only for the brands you service weekly. Our mixed-fleet guide walks through the decision.
Do your laptop kits come with software already installed?
Yes. Every kit ships with the software installed, licensed, activated and tested on the laptop. You open the lid, plug in the adapter and connect to the truck — no downloads, no license servers, no IT department.
Can I finance a diagnostic laptop kit?
Yes — weekly-payment financing is available on every kit over $1,000. Most approvals come back same-day. See financing options.
Do you support Chinese trucks and off-highway equipment?
Yes. We cover Sinotruk, Shacman, FAW, Howo and Dongfeng via multi-brand platforms, plus construction, agriculture and marine equipment through Jaltest OHW/AGV/MHE kits. See the Chinese truck hub and off-highway hub.