Hardwire the appropriate resistor into your passkey wiring if you don't want to use a module. The bad thing is, if you don't know what you're doing then it is probably best you do not attempt it. That being established, here goes:
You will need: wire stripper/cutter, a digital multimeter, and various resistors
There should be three wires close to eah other coming from the ignition cylinder; red/white, orange/black or black, and yellow. These wires should be grouped together and only be around the size of 20ga.
Strip a piece of coating on the black wire, do not cut it.
Cut the yellow wire and strip a little off both sides to test.
Put the vehicle in gear so it won't try to start.
Set your multimeter to read resistance.
Use one lead of your multimeter and clamp it to the orange/black or black wire. Clamp the other lead to the ignition side of the yellow wire.
While watching your meter reading, insert the key and turn to ign.
The reading your meter displays will be the approximate value of the resistor you will need. For example, if your meter reads 1.34k ohm, then you want the closest resistor you can find for that value.
Now you will need to wire that resistor from the orange/black or black wire to the bcm side of the yellow wire.
Test start the vehicle before you finish up to make sure you don't have any security lights come on.
If you do have a light come on, or it doesn't work, reset the passlock system and try again.
I have done hundreds of trucks this way for remote starts and seldom heard of one failing. When they do fail its usually from a kit that was installed in a 110 degree summer and the resistance changed enough with temps in the teens during winter to make the pass key system act up. I simply put in a different resistor and never had a problem again.
