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.
Most WAMS upgrades are fully plug-and-play and require no dealer involvement. Only Global B instrument clusters need simple outside setup due to GM’s security marriage procedure. This guide explains exactly what requires what — and why almost all WAMS products can be installed at home.
An in-depth explanation of GM instrument cluster lens replacement, why lenses aren’t dealer-serviceable, how WAMS supplies new and refurbished options, and how to verify correct fitment.
When GM ended support for map updates on HMI-based infotainment systems, it left owners of factory navigation–equipped vehicles without a… Read more GM Discontinued HMI Map Updates — But WAMS Still Offers the Final Release
A Complete OEM-Pattern Retrofit Guide for 2013–2015.5 HMI Systems** Many GM owners of early MyLink, IntelliLink, and Cadillac CUE systems… Read more Can I Add Apple CarPlay or Android Auto to My GM Vehicle?
Introduction Whether you’re diagnosing a vehicle, selecting the correct replacement module, verifying feature content, or ordering a retrofit, your GM… Read more How to Find and Understand GM RPO Codes (Modern QR Label vs. Legacy SPID Label)
Overview GM’s mid-year 2022 split for the Silverado and Sierra 1500 created one of the most confusing identification issues in… Read more How to Tell If Your Silverado or Sierra Is a Refresh Model (2022.5+)—Even If It Looks Like the Old Interior
(And why It will likely always be the best) As many people have noticed, our GM EV / Ultium-platform CarPlay and… Read more Why We Discontinued the Ultium CarPlay & Android Auto Upgrade
Understanding which infotainment module your GM vehicle uses is essential when diagnosing failures or selecting a proper replacement. GM has… Read more Understanding GM HMI and CSM Infotainment Systems: Identification, Failures, and Replacement Guidance
For more than two decades, WAMS has followed a simple rule: if a component is available brand-new from GM with… Read more Why we use only Brand-New GM Parts — And why you should too.