Avital 4103, 2008 TrailBlazer

Yes, I was referring to the thick brown wire. Everything works once it starts. Heat/AC, heated seats, no CEL's so I'll let it ride. Thanks for all of your help!

kreg357 wrote: If you are referring to the thick Brown ACC2 wire in the Trailblazers ignition harness, it may or may not need to be powered during a remote start.  Not sure exactly what circuits it controls.

Brown Accy2 wire: Hot in RUN and ACCY For the following Rear Fuse Block circuits #29 Rain Sensor #35 Transmission Control Module #33 Front Wiper #31 "TBC ACC" goes to BCM. Probably does not need to be energized with RS.

Thanks for the clarification Dave. Something new is happening now and I'm not sure what changed. If I start the truck with the remote after I lock the doors and arm the truck the alarm goes off when it starts. I can unlock it first and then start it with no issues but I was able to start it armed last night. I think the last wire I tapped into was the tach wire. Any thoughts on what could be triggering this?

Factory alarm? If the avital is being set off, what do you have hooked up to the trigger/sensor inputs and what zone does the avital indicate as being triggered?

catback wrote: Factory alarm? If the avital is being set off, what do you have hooked up to the trigger/sensor inputs and what zone does the avital indicate as being triggered?

Yes, factory alarm. The 4103 is a remote starter only, no alarm.

Here is the final update. Not sure what the deal was with the alarm going off yesterday but when I got home I double checked all my wires, did another tach relearn and tested it again. The alarm is no longer going off when the truck starts. Tested it locked, unlocked, windows open etc.. everything is working perfectly. Thanks again for all of your help!