I am in the process of swapping my totaled '91Z components into my '87 LT and am wondering how I'm supposed to find out the resistance of my key chip??? If I've already stripped the '91 of all its interior/dash components. Meaning the steering column is still in the car, but nothing else is.

Please help!!!

 

You could always measure it with a multi-meter......pretty easy. Are you bypassing it?

You probably don't have the key eh? Ask the dealer if you can measure the resistance of the keys that they have, or ask if they know. There are only 7 or so different values so it shouldnt be too hard to guess and check. Most remote start boxes come with them so you could ask a stereo shop what they know for values. Once you know the value, you can put the resistor in there to bypass or get the right key made.

 

Cool thanks man. I was hoping thats all I had to do for measuring the chip. I do still have one of the keys so, I'll have to measure that *****.

 

you betcha. I'll remove mine when the time comes. The hard ones are the toyota vans with the RF transmitter in the key. There is no way around it except to take a spare key, wrap wire around it and then continue the wires to the tumbler, wrap the wire around it, and then back to the spare key. That couples the RF signal from the spare key in the dash to the tumbler, so the computer thinks the key is in the tumbler. So consider yourself lucky!

 

Are you going to be putting the computer in the 87 as well? If you are planning on putting VATS into a non-VATS car then you will have to have a computer chip that is programmed to work with the VATS module. There are 15 different codes that GM uses in their V.A.T. systems. They are as follows, (1) 402, (2) 523, (3) 681, (4) 887, (5) 1130, (6) 1470, (7)1870, (8) 2370, (9) 3010, (10) 3740, (11) 4750, (12) 6040, (13) 7500, (14) 9530, (15) 11800. These resistance values are in OHM's. Since you still have one of the keys, the parts department at your local dealership can tell you the resistance value of the key usually at no charge. However the key is no good without the VATS control module and the computer chip programmed to recognize it. No, the computer module and chip from the 91z are not compatible with the '87LT.

The Trickster!!!!!!!!!!!!!!!!!!!

 

Yep, I have the entire electrical system from my '91 in my '87. Thanks for your help.

 

You lost me on that one man, I'll just take my lucky car and run away now.

 

:rockon: