Not sure about the older cars but the newer stuff GM gives the connector body part number. All you would need to do is release the terminals and plug them into the new body. Would be a lot cleaner than cutting and splicing in pigtails. This would even work if you found a scrap car and snip off all of the connectors you'd need, the terminals release fairly easily and i have 30+ trays of replacement terminals if needed.
If I get a chance I'll try and get on the parts computer. Most of them are available through AcDelco.
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