Project Gretio

Preview of App

Gretio is a modern scan tool for enthusiasts and professionals alike. It features an advanced dashboard system for viewing various sensor data. It can also perform advanced diagnostics on all of the primary modules you will find in a GM vehicle.

You can download Gretio for free on your mobile device’s app store!

Download on the Apple App StoreDownload on Amazon App Store

See list of known supported vehicles here

Gretio Common Terms & Glossary

Supported OBD2 Devices

* Only MX and MX+ models support GM SWCAN.


Surreal Development has published a document helping people diagnose emissions issue in select General Motors diesel vehicles

The document is publicly available here.