TEXA USA announced the IDC6 Truck 2026.20 software update on October 14, 2026. It updates 38 brands in the main truck diagnostic system and 9 brands in the North America heavy duty system, and adds 2 new dashboards, 19 new wiring diagrams and 4 new technical sheets. The work covers industrial vehicles, light commercial vehicles and buses. Here is what 2026.20 adds for heavy duty shops and fleets.
The highlights in Truck 2026.20
TEXA called out three items in the 2026.20 release notes, and all three are North American heavy duty systems.
Cummins: EPA 07 to GHG diesel injection
TEXA updated the Cummins EPA 07 to GHG diesel injection system. Cummins engines are common in North American trucks, so coverage across those emissions generations is useful day to day.
Kenworth and Peterbilt: PACCAR EAS 4, GHG 16 to GHG 21
TEXA updated the PACCAR EAS 4 GHG 16 to GHG 21 diesel injection system for Kenworth and Peterbilt. Shops and fleets running late-model Kenworth and Peterbilt trucks with PACCAR power should check this one.
Freightliner: Detroit TCM, PowerShift 5
TEXA updated the Detroit Transmission Control Module (TCM) PowerShift 5 system for Freightliner. Transmission work needs real system access, so this is a practical addition for anyone maintaining Freightliner trucks.
North America heavy duty: 9 brands updated
The Heavy Duty Diagnostic System (North America) update covers Cummins Engine, Ford, Freightliner, International, Kenworth, Mack, Peterbilt, Thomas Built and Western Star.
Main truck system: 38 brands updated
The main Truck Diagnostic System update covers these makes, as listed in the release notes:
- North American trucks and buses: Freightliner, International, Kenworth, Mack, Peterbilt, Thomas Built and Western Star
- Engines and systems: Cummins Engine, FPT Engine, Knorr-Bremse and WABCO
- European and Asian trucks and buses: DAF, DAF (LATAM), Foton, Iveco, Iveco (LATAM), Iveco Bus, MAN, Mercedes-Benz, Mercedes-Benz (LATAM / Asia Pacific), Mitsubishi Fuso, Renault Trucks, Renault Trucks (LATAM), Scania, Scania (LATAM), UD Trucks (Nissan Diesel), Volkswagen Trucks, Volvo Bus, Volvo Trucks and Volvo Trucks (LATAM)
- Light commercial vehicles: Citroen, Fiat Professional, Ford, Nissan, Opel, Peugeot, Renault and Volkswagen
TEXA counts regional versions such as DAF (LATAM) as their own entries, which is how the list reaches 38.
Dashboards, wiring diagrams and technical sheets
The 2 new dashboards cover live data, adjustments, settings and system scanning. The bigger part of this release is repair information: 19 new wiring diagrams and 4 new technical sheets, so your techs spend less time looking for information and more time on the repair. For full model detail, TEXA points customers to its diagnostic coverage pages at texausa.com/coverage.
How to get the update
TEXA makes its IDC6 updates available to customers with a valid TEXPACK subscription. If your TEXPACK is active, the update is already available to you. If your subscription has lapsed, read why renewing your TEXA subscription matters, then give us a call. New to IDC6? Our IDC5 vs. IDC6 explainer covers what changed in the software platform.
Support from Defy Diagnostics
Active TEXA users get free remote support from Dave, 9 to 5 ET, plus unlimited remote training. We help with setup and activation, so you can get the new coverage working without guesswork.
If you are adding TEXA to your shop or fleet, browse our TEXA diesel and heavy duty diagnostic kits. Tell us which trucks you see most, and we will quote a kit built around them.
Talk to a Diagnostic Expert
Questions about Truck 2026.20 or whether your vehicles are covered? Call 864-803-3744 or email Dave@DefyDiagnostics.com. Ready to price it out? Request Your Custom Kit Quote.
Sources: TEXA IDC6 Truck 2026.20 release notes and the TEXA USA 2026.20 announcement.
