Ignition module - #24503624...GMPartsDirect shipping is high but I don't think you'll find it cheaper anywhere else...don't have coil pack # but Kirban seems to have the best price on them...$49...
If Kirban is selling them that cheaply, I'd go with it! It typically runs about $89 for a Standard or Borg-Warner brand replacement in an aftermarket Retailer such as AutoZone, O'Reilly, etc.