Probably the wrong wires. I didn't have the problem when I installed on this truck, but on my last truck (s10) I had wires that triggered at the right times, but were only 1. 5 volts or something like that. You can either pull 12 volts from somewhere else and use a relay with the wires you have as signal wires or find the wires under the dash that already have 12 volts going to the locking mechanisms in the doors. I did it over 2 years ago, so can't remember what wires I used... for that matter, they could be different on my 04 vs. your 06.