unfortunately, i dont have the original cylinder.. not only was it an akl but the barrel had been taken as well.

 

General Motors Vehicles Equipped with PASSLock I/II
Following is a list by model year of the General Motors vehicles that have been and are equipped with the PASSLock Anti-Theft System:
Buick Rainier 2002, 2003
Buick Skylark 1995, 1995-1/2, 1996
Cadillac Escalade 1998-2004
Chevrolet Cavalier Z24 1995-1/2
Chevrolet Cavalier 1995-1/2-2004
Chevrolet Cobalt 2004
Chevrolet Impala 1998-2004
Chevrolet Malibu 1996-2003
Chevrolet Monte Carlo 2000-2005
Chevrolet Astro Van 1996-2004
Chevrolet Express van 2002-2005
Chevrolet Full size pickup 1997, 1998
Chevrolet S-10 Blazer 1996-2003
Chevrolet S-10 pickup 1997-2004
Chevrolet Silverado 1997-2004
Chevrolet Sport Van 1997-2000
Chevrolet SSR 2002, 2003
Chevrolet Suburban 1997-2002
Chevrolet Tahoe 1998-2005
Chevrolet Trailblazer 2001-2004
GMC CK pickup 1997, 1998
GMC Envoy 2000-2003
GMC Jimmy 1996-2002
GMC Safari Van 1997-2004
GMC Savanna Van 2001-2004
GMC Sierra 1997-2003
GMC Sonoma pickup 1997-2003
GMC Suburban 1997-2002
GMC Vandura/Rallye 1997-2000
GMC Yukon 1996-2003
Hummer H2 2001-2003
Isuzu Hombre 1997-2001
Isuzu Ascender 2002-2004
Oldsmobile Achieva 1995-1/2-1997
Oldsmobile Alero 1998-1999
Oldsmobile Bravada 1997-1999
Oldsmobile Cutlass 1996-1998
Oldsmobile Intrigue 1997-1999
Pontiac Grand Am 1995-1/2-2003
Pontiac Sunfire/GT 1995-1/2-2004
Saturn Ion 2001-2003
Saturn L300 2000-2003
Saturn Vue 2000-2003

 

https://www.adcmobile.com/tech/audio...passlock_2.pdf

 

thanks for that...wish id had this diagram at the beginning.. its the only simple to understand one ive come across

 

Already told you H3/H3T keys are NOT chipped, as in there is NO resistor or chip in the key, none.

 

the "chip" is in the actual contact switch. if you use the origional programed one it should turn on.
or the previous owner has a cutoff switch. or a gps tracker might be activated.

 

yeah, apologies.. you are, of course, right this is the first time i've worked on an american vehicle and there is just so much conflicting stuff on the web.. why this info wasn't easy to find i don't know... i've spent too many hours in front of this laptop

 

this is getting really confusing now... so, I found a photo of a cylinder casing for a h3 and it shows three wires leading to a hall sensor in the casing.. i understand the logic, the magnet alters the resistance which changes the voltage going down the reference wire to the bcm.. only problem with mine is.. it doesn't have any wires going to a hall sensor.. it has a live and ground going to the key retention solenoid and all other wires come from the switch.. anyone able to shed some light on this? I know I must seem a little thick but Im just doing my best to learn as i go...

 

maybe they did a resistor mod to the ignition switch wiring. they ohm out the ignition switch and put in a resistor of that value but if you can get your ECU programmed they can just disable VATS then no more security issues.
that might be your simplest solution.

 

thanks buddy... i dont know if my programmer will do anything on this system ( its an Autel 508s ) but certainly worth a go...
I have oredered a remote start, that might provide a solution.. im back there on thursday so i will check all the wires coming out of the switch to see if the match up to what a passlock 2 wiring should be ie 5v reference etc..