Best Diagnostic Setup for LT625 Fleet — Laptop Software vs OBD Tools?

Hey all,

I run a small fleet of 5 LT625 trucks, and we’re looking at an OEM-level diagnostic solution.

Our main goal is to be able to:

• Read and clear “Check Engine” codes
  
  
• Monitor live data (fault count, active/inactive codes, derate status, regen status, etc.)

We understand handheld OBD scanners have limits, and buying 5 separate tools isn’t cost-effective. Most of our drivers already have access to a PC or laptop, so we’re considering a software-based solution instead.

Questions for the group:

1. Has anyone successfully used GM OEM software (GDS2 / Tech2Win) on the LT625 platform?
   
   
2. Which interface works best in real life — OEM MDI2 or J2534 devices like VXDIAG VCX Nano?
   
   
3. For a small fleet, is it better to run:
   • a shared standalone shop PC, or
     
     
   • laptops with the software used by drivers/techs as needed?
4. Any known limitations when it comes to clearing CELs, monitoring fault counts, emissions/regen status, or derate conditions?

Not looking for cheap code readers — aiming for something as close to dealer-level as possible without buying multiple full kits.

Any real-world feedback would be GREATLY appreciated !!
Thanks ahead, and keep trucking !

 

We have both A26 and X15s engine, my main one to diagnose would be the A26 right now ... Many EGR Valve Errors etc