I have a 2001 Tahoe with the Delco Radio PN 09383075. Have been designing a circuit to do bluetooth audio with factory harness (no modifications just plug into radio harness). I'd like to decode the Class 2 Data so I know when play buttons are pressed and transmit those to a source Bluetooth device....

AWESOME thanks @antus.

Wow super cool! Thanks for sharing. I'll look through this. Yesterday I spent several hours and got something going but then realized the bits were variable width *duh* so need to rewrite it. Will be awesome to see how you did it there. No worries on platform. Fiddled with most of them over the years.

Anybody have code from a microcontroller (and or circuit design) to decode J1850 VPW? I assume most elegant design is actually whatever the manufacturer uses... Has anybody reverse engineered that? Been searching it out but haven't found a solution I like. Most of the designs I've found purchase a s...