Ok here's some info copied from corvetteforum.com US.
This is for the KEY. The chip in the key energises the ignition circuit I believe. The FOB is to lock/unlock & alarm. It is programmed to the car separately,as above. KEY:
"If you have a Volt Meter you can test the OHMS (The Value) of the chip yourself. Just set your Voltmeter to check to 20 K OHMS Take each lead and place it on each side of the " chip " on your key. A number will appear. Take that number on your voltmeter and apply it to the OHMS chart below. Keep in mind that it may not be exact. Just pick the closest value to your reading. I do realize that some of you don’t even know what a Volt Meter is, not to mention having one. So there is a great alternative for you. Just take your key to a Radio Shack, or your local Auto Mechanic. Ask them to do as I described above."
THIS CHART IS FOR ANY GM PRODUCT, BUICK, CADILLAC, CHEVROLET, AND PONTIAC THAT HAS A VATS KEY, SINGLE OR DOUBLE SIDED KEY.
VATS # k OHMS
1———— 0.402
2———— 0.523
3———— 0.681
4————-0.887
5————-1.130
6————-1.470
7————-1.870
8————-2.370
9————-3.010
10————3.740
11————4.750
12————6.040
13————7.500
14————9.530
15————11.801
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