2010 Sierra Standard Evo-All THARGM4 No Alarm Functions

Question

Programming was successful, vehicle starts, door locks continue to work via factory remote. Evo-all seems to be monitoring door switches as it will shut down if a door is opened when locked. However no alarms sound whether that's the factory alarm or evo-all. What could be the problem here? I was looking to supplement the factory alarm with evo-alarm for shock/glass break sensors. I'd settle for just the factory alarm working again.

Answer 1

Wire the horn wire (green wire on the whote 20 pin connector evoall), you will find it as follows:

Horn Trigger brown/white - BCM under driver dash, brown 26 pin plug, pin 19

Comments

Ok, that may resolve the evo controlling the horn but why would the evo completely disable the factory alarm? It can disarm/arm it via CAN but it cannot trigger it?