dpk mods

I have been installing for many years and in the last two years I have stoped doing it for a job. On the side I do a car once in a while, so today I put an avital 5303 in a 05 tahoe easy truck so I thought. I got done in about half an hour but I cant get the DLPK GM to program. I went wire to wire not data to data. hooked purple to the purple dionostic wire, and it will not go into program mode. I follow the instuctions by my understanding is to push and hold program button plug first harness in then the led should light up and it does nothing.   I just did a 07 silverado last week and had the same problem with the dlpk but for some dumb reason it worked without programing. any Ideas????bam

did you cut the data harness and wire 12v to blue and black to ground

yes i did that alsobam

On the 4-pin harness that has the power and ground, what colors did you use? You'd think it would be red and black, wouldn't you? Well, someone at DEI needs a slap upside the head. Black is ground, and constant is......blue! The red and white don't go to anything.

Really I will have to try that thank you very much!!!bam