Z-Flash OBD for GM Quick Start Guide
Before installing, verify you have all the correct pieces:
1 - OBD for GM Module
2 - On/Off Switch
Step 1
While the vehicle is off, connect the Z-Flash OBD-2 Module to the OBD-2 Pass Through Switch.
Step 2
With the vehicle off, plug in both the Switch and Module into your vehicle simultaneously
Step 3
Start your vehicle and activate the module using the Switch by holding the button down for 1 second. To change patterns, press it again for pattern 2 and repeat for pattern 3. Do it once more to turn off the Z-Flash.
When activated, you can increase the pattern speed by pressing the door lock button.