Whats the best/reliable Passlock I bypass

here's a little trick for ya-it will permanently bypass passlock I

with the lower dash and steering column shroud removed, locate the passlock wires coming off the ignition.  depending on the situation you could have three black wires with various stripes or one black, one yellow, and one white.  the wire you need is the yellow(or the black that shows the key's voltage)

after starting the vehicle w/ the key, wait for all of the signals and indicators in the instrument cluster to go out. (hold the door pin if you have to). now simply cut the yellow wire.  booya!

that's what you call a "no-fault start" bypass.

now, you wont have any problems w/ passlock preventing start.  if you want to disable theft light you will have to wire in a resistor.

just so you all know, i have used this on gm's as late as 2004, so passlock I, II, and III can be bypassed like this

Never heard of that one before.  but the theft light would stay on?  That would drive me nuts.

tim

yep-

this is actually part of the factory gm system and doing this knocks the passlock system into a "safe mode".  it can be reversed by reconnecting the yellow wire and restarting vehicle. 

you just need to wire a resistor inline to defeat the theft light, no relay required