cluster swapping
You will not get to keep your milage.
You will have to trigger a programming sequence which can be done without any computers.
Re'
Pull ebrake so headlights don't come on:
Turn ignition on and leave in run position for ~30 minutes.
Turn off for 10 minutes.
Repeat about 4 times. Maybe more.
It took awhile for me but the cluster finally learned. The first couple of times when the car comes on each module sends out a code unique to the car. When the cluster fires up it sends out a code from the old car. The other modules ignore that code and the cluster is left out. As you turn the key on and off the cluster will learn the code and start to transmit that one.
It takes a long time to do this. I guess GM did it to discourage theft.
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