Davie Developer Tool (DAVIE 4) – Tweetie Tunez x NFX Tuning
The Davie Developer Tool (DAVIE 4) is PACCAR’s dealer-level diagnostic and engineering software used on Peterbilt, Kenworth, and DAF platforms. This is the same environment utilized by authorized dealers and engineers to perform advanced diagnostics, parameter control, calibrations, and guided troubleshooting—not a basic scan tool.
What You Get
Full Dealer-Level Diagnostics – Read/clear faults, live data, tests, and guided workflows
Developer / Engineering Access – Advanced parameter visibility and system control
ECM, ACM, CPC Support – Deep access across supported PACCAR modules
Online Capabilities – Supports dealer workflows and updates (license dependent)
Professional Installation – Clean setup, optimized for performance and stability
System Requirements & Add-Ons
Windows XP is REQUIRED to run keygen tools properly
If you prefer individual keygen passwords, they are available for $125 per password
Keygens/passwords are sold separately unless bundled

