"Home-made" remote starter

I have a 2001, 6.0 GMC pickup that I am going to attempt to put a remote start in.  I have these small programmable computers with 12 inputs / outputs.  The outputs are relays, inputs just sense continuity to ground.  Anyways, they are completely programmable and will run off of vehicle voltage.  

I have installed a couple of real remote starts, but these were on older vehicles, I really don't want to cook anything, as the truck is a company truck.  (If this works I'll do it on my own truck.) 

Anyways, I need some instructions on how to install a remote start unit on a GM fullsize truck with a gas engine, (if it works, I'll need info on the Duramax)

This could be cool, or, it could be really dumb.

thanks,

Because it's free and I have lots of time..... while at work.

Anyways, How does a remote start monitor the engine?  Also, I can set this thing up so the truck comes on at certain times, and I can control it via microwave radio.  (Start / Stop, time on, voltage sensing and temperature sensing all can be done...  the only thing that could be hard is the tach.)

|              12V|red                 |+  |ignition harness            |
|          STARTER|yellow              |+  |ignition harness            |
|         IGNITION|pink                |+  |ignition harness            |
|  SECOND IGNITION|white               |+  |ignition harness            |
|        ACCESSORY|orange              |+  |ignition harness            |
|       POWER LOCK|lt. blue            |+  |brown plug at BCM *1        |
|     POWER UNLOCK|white               |+  |brown plug at BCM *1        |
|       LOCK MOTOR|gray                |   |drivers kick panel          |
|     UNLOCK MOTOR|tan                 |   |drivers kick panel          |
|    DISARM DEFEAT|tan/black           |   |passengers kick panel       |
| PARKING LIGHTS +|brown               |   |lt. blue plug at BCM *1     |
| PARKING LIGHTS -|white               |   |lt. blue plug at BCM *1     |
|       HEADLIGHTS|white               |+  |lt. blue plug at BCM *1     |
|     DOOR TRIGGER|*2                  |-  |BCM *1                      |
|FCTRY ALRM DISARM|lt.green            |-  |drivers kick *4             |
|       TACHOMETER|white               |   |ECM *3                      |
|      SPEED SENSE|dk.GREEN / WHITE      |   |ECM *3                      |
|       BRAKE WIRE|white               |+  |brake pedal switch          |
|     HORN TRIGGER|black               |-  |brown plug at BCM *1        |
|           WIPERS|                    |   |                            |
|  LF WINDOW UP/DN|blue   -   brown    |A  |drivers door switch         |
|  RF WINDOW UP/DN|blue   -   brown    |A  |passenger door switch       |
|  LR WINDOW UP/DN|                    |   |                            |
|  RR WINDOW UP/DN|                    |   |                            |

Notes:
Note:  This vehicle has the passlock II immobilizer system that, when adding a remote start, must be interfaced with.  Note: Diesel glow plug, dk. blue(-) located at the instrument cluster. Diesel tach wire is white at the cluster.  *1 The BCM is located behind the drivers side of the dash.  The plugs on the BCM face towards the rear of the vehicle. The parking lights are in pin A5 and the headlights are in pin A11.  *2 Use tan for the drivers door located in pin B4 of the purple plug, and for the passenger door it will be a orange in pin B2 in the purple plug or dk.blue/white in pin B11 of the lt.blue plug, must diode isolate these wires.  *3  ECM is located near the battery, down low, between the fender and the fan under the black plastic cover. On the 4.3L, the tach wire is at pin 20 in the connector labeled "red", and VSS wire is at pin 3 in the connector labeled "black". On the 4.8L, 5.3L, and 6.0L, the tach wire is located at pin 10 in the "red" connector, and VSS wire is located in pin 50 of the "red" connector.  *4  Also found in the purple plug of the BCM.

no problemo