2004 GMC Sierra Alarm/Remote Start Wiring

UPDATE:  TAILGATE LOCKING SYSTEM:

GM Full-size trucks from 2003 and up have a Multiplex Door Locking System, this means the MOTOR wires WILL NOT be accessible in the interior kick panels. When installing a TAILGATE LOCK, the motor wires can only be found INSIDE the DRIVERS or PASSENGERS door at the motor.

*1 - The BCM is located behind the drivers side of the dash. It has (6) plugs on the BCM with the PURPLE plug on the back.

*2 - On BASE model trucks the door trigger wires are in the LIGHT BLUE plug at BCM, pins B4 Drivers door and A5 Passengers door. On 4 door trucks the Left Rear door trigger wire is LIGHT BLUE/BLACK, pin A3, the Right Rear door is LIGHT GREEN/ BLACK, pin A2. They are in the PURPLE plug at the BCM. Use all wires and diode isolate.

*4 - The PCM (Power Control Module) is in the left front of the engine compartment to the left of the fan shroud. The tach wire is in the GREEN plug, pin 10. For tach you can also go to any of the ignition coils and use the wire that is NOT PINK, BLACK or BROWN.  Wait-to-Start wire is BLUE in instrument cluster or PCM.

Thanks for the quick responce. I checked all wiring readings with a digital meter. On white wire from Ignition switch harness ad found out that the reading for ing 2 is actually orange wire wich has a 12+ at ON/RUN and 12+ at start. The question is if it should be used for Ignition switch harness instead of white wire wich has 12+ at Acc, 12 + at ON/RUN and 12+ at start. Another question is if this vehicle has the parking lights are ground swithched or a +12 volt swithched.

Thanks,

Sorry for the confusion I guess I clicked the mouse I typed somewhere else. Here is the right wording...

Thanks for the quick response. I checked all wiring readings with a digital meter. On white wire from Ignition switch harness I found out that the reading for ing 2 is actually the orange wire which has a +12 at ON/RUN and +12 at start. The question is if the orange should be used for ing 2 instead of white wire which has +12 at Acc, +12 at ON/RUN and 12+ at start. Another question is if this vehicle has the parking lights ground switched or a +12 volt switched.

Thanks,

I checked all wiring readings with a digital meter. On white wire from Ignition switch harness I found out that the reading for ing 2 is actually the orange wire which has a +12 at ON/RUN and +12 at start. The question is if the orange should be used for ing 2 instead of white wire which has +12 at Acc, +12 at ON/RUN and 12+ at start. Another question is if this vehicle has the parking lights ground switched or a +12 volt switched.