1999 Cadillac Eldorado remote start

Here's a link for your car: 99 Eldorado And here's a link for VATS bypass diagram, no need for module: techtip 1049ASE Certified

There's no need to buy the whole pack, your Cadi's key should have a small black chip looking thing on it. That's a resistor, use a Digital Multi Meter, switch to resistance or Ohm's and measure the resistor on your key. Go to your nearest Radio Shack and pick up some resistor's. You may not find the exact value of resistor at the store, but if you find one very close in value, about 5% over or under the value should be o.k. adding resistor's in line (series or parallel) is ok to come close to the value on your key.ASE Certified

1/4 w is fine if you want to all you have to do is cut  the orange ribbon wire and solder a resistor on the 2 wires comming from firewall but it defeats the vats over 20 years of experience in the 12 volt industry