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Hey guys I have a 1984 1st Gen Blazer 2wd and I swapped out the old 2.8 for a low mileage 2002 blazer complete drivetrain that is now installed, I used the complete harness the engine turns over but cannot get it to run.. getting fuel but no spark and the gauge cluster security light stays on ,not sure if I have the correct wires connected.....need some help on what wires should be connected.
 

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not really sure. you may need to turn off the security in the pcm. I dont suppose you have one of the gm tech tool programers?
 

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time to get cereal
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Do you have the BCM and the 2002 ignition switch? You'll need those for it to run. You have to have the whole passlock system intact.
 
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