WAMS VIN lookup identifying a 2016 Chevrolet Tahoe and asking for the HMI type

Ordering GM Parts by VIN: How WAMS Makes It Simple

Posted on September 11, 2026September 11, 2026 by WAMS Tech Notes

GM electronics are genuinely complicated. A single model year can include several hardware versions, and the differences between them are… Read more Ordering GM Parts by VIN: How WAMS Makes It Simple

Side-by-side comparison of a modern GM RPO QR label and an older GM SPID Service Parts Identification label showing where RPO option codes are found.

How to Find and Understand GM RPO Codes (Modern QR Label vs. Legacy SPID Label)

Posted on December 9, 2025May 18, 2026 by WAMS Tech Notes

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)