Technical troubleshooting support for GM electronics, including communication issues, installation pitfalls, programming errors, module behavior anomalies, and root-cause diagnostics. Focused on real-world field experience and OEM-level system behavior to help identify and correct complex issues efficiently.
Camera issues after swapping mirrors on GM vehicles are often misdiagnosed as calibration failures. This Tech Note explains why calibration is typically drive-based, why it cannot complete after mirror swaps, and how camera processing configuration causes clipped views, missing guidelines, and hourglass icons.
Ghost touches, phantom inputs, and random screen behavior in GM vehicles are commonly misdiagnosed. This guide explains why the touchscreen digitizer and controller are almost always the real cause — not the HMI
A blank or frozen infotainment screen on GM vehicles is often misdiagnosed as HMI failure. This guide explains how the MOST bus ring works, why the Radio is the system master, and how failures in any node—amplifier, cluster, media player, or wiring—can take the system down.