Dbw manual transmission cruise control

[3teeg1]

Hi, I have a 2006 Gmc Sierra with a factory manual transmission (nv3500). the truck was swapped from v6 to 5.3 (2004 dbw, TAC and pedal are from different trucks).
I am trying to add cruise control but couldn't make it to work. On the pigtail (4 pins), I wired the (DK Blue), (GRY/WHT),(GRY/BLK) to the TAC module (each with a relay) and connected them (pin 30) to the TCC along with the brown wire to receive 12v power. Also, I connected the CHMSL wire (light blue) to the rear left brake light.

Here are the readings in the VCM scanner..

- cruise on/off: on when brake is not applied , and off when applied .
- cruise set/coast: works
- cruise resume/accel: works
- cruise active: NO
- cruise lockout: Yes (all the time even after 25 MPH)

so, is there any problem with wiring or the tune?

[Alvin]

There is a separate input for brake I think.

From memory there is a master on/off switch + a separate brake input.

The brake input might be opposite of what you think (hot while not on brake)