What We Do
Advanced Electrical Troubleshooting
Systematic diagnosis of complex electrical faults using OEM-level scan tools, multimeters, and oscilloscopes. We trace wiring issues, shorts, and open circuits to the source.
ECM / ECU Diagnostics & Programming
Engine control module diagnostics, reprogramming, and calibration. We work with Detroit Diesel, Cummins, PACCAR, and other major ECM platforms.
Starting & Charging Systems
Alternator, starter motor, battery, and charging system testing and repair. We handle high-amperage commercial vehicle electrical systems.
Fleet Electrical Diagnostics
Multi-vehicle fleet electrical health checks, recurring fault analysis, and preventive electrical maintenance programs to catch issues before they strand your drivers.
Vehicles & Equipment We Service
- Class 1–8 Commercial Trucks
- Refrigerated Trailers (Reefer Units)
- Heavy Equipment & Construction Vehicles
- Fleet Vehicles & Box Trucks
- Diesel Pickups & Utility Vehicles
- Fire Apparatus & Emergency Vehicles
Why Choose Granger Enterprise
- Electrical diagnostic specialists — not generalists
- OEM-level diagnostic software and hardware
- Experience with all major truck and engine brands
- Fleet-wide electrical health reporting available
- We fix it right the first time — no guesswork
As a 100% women-owned company, we deliver precision, accountability, and high-quality workmanship on every job. We built this business on trust, expertise, and getting your equipment back to work — fast.