gm-tech2-diagnostic-user-manual.pdf (6.8M)
gm-tech2-diagnostic-vehicle-list-obd2express.pdf (375K)Customer technical problem for GM TECH2:
When you start your gm tech2, if you see the following picture, please have a try as we tell you:
1. After you start your gm tech, please click the key "shift" on the main unit:
2. After the relative LED lights, please press the "up" key to increase the brightness of your screen.
Any problem, you can contact us at sales@OBDexpress.co.uk