Thundermedic

I'm having the same issues on my 07 Colorado as well... Pin 25 is a yellow and black wire, but my D3 reads the pulses but doesn't calibrate them, i have full bars on the Left and Right turn 3D status but nothing else.... So don't feel bad, your not the only one in that boat, or truck that is...

I'm Getting the same problem on a 2007 Chevy Colorado, Same Demo screen on startup, and on one wire i get very high numbers, the other is nothing...