SWCAN

Single wire Can GMLAN module. The ZIP contains the Gerber if you want to build one. Kicad footprint is included if you want to use one of these modules on your project. The PDF is the schematic.

SWCANPRO.ino

Here's an example code that lets you TX and RX GMLAN 33.3k. It's still a work in progress. TX needs a function; currently, it just sends a placeholder frame. It uses this library: https://github.com/autowp/arduino-mcp2515 I have not tested on the latest library release, but it should work.