▸ TRADE SERVICE
Diesel and heavy-duty
diagnostics & programming.
Diesel and heavy-duty work is a strategic Spot-On specialty. Our lead technician holds ASE Master Medium/Heavy Truck and ASE L2 Electronic Diesel Engine Diagnosis Specialist. We program Cummins via INSITE, Power Spec, and Calterm with current OEM subscriptions; Duramax via GDS2 and TIS2000; and Powerstroke via FDRS. DEF/SCR programming, EGR adaptations, post-rebuild calibrations, and heavy-duty electrical diagnostics for shops and fleets across the San Antonio metro plus mail-in nationwide.
▸ PLATFORM COVERAGE
Three OEM diesel families. Full toolchains.
- CumminsINSITE for engine diagnostics and programming. Power Spec for parameter changes. Calterm for engineering-tier calibration. Heavy-duty B6.7, ISB, ISL, ISX coverage.
- DuramaxGDS2 + Tech 2 + TIS2000 for legacy and modern Duramax platforms. LB7 through L5P coverage.
- PowerstrokeFord FDRS with current OEM subscription. 6.0L, 6.4L, 6.7L, 7.3L Godzilla.
- Other heavy-dutyDetroit Diesel, Allison transmissions, ZF commercial transmissions. ASE Master Medium/Heavy Truck credentialed.
▸ COMMON PROCEDURES
What working diesel shops send us.
- Post-rebuild ECM calibrationAfter engine rebuild or replacement — injector codes, fuel system learn, governor calibration.
- DEF / SCR programmingDiesel exhaust fluid system reprogramming and emission system service.
- EGR adaptationsAdaptation procedures and system service post-replacement.
- Module replacementECM, TCM, body control modules — VIN write, variant coding, security adaptation.
- Fleet diagnosticsRecurring-relationship fleet work — ask about partner pricing.
▸ READY TO DISPATCH
Request this service.
Call with the OEM, module, and fault codes. Same-day available for most platforms during business hours.