A few things about the LT1 PCM----matters what year they are---Resistor in key and body control module are important items(theft control) If you had wiring harness and PCM and body control module and ignition key from same vehicle it would simplfy matters---

I have done some by working my way throw it---but now Painless Wiring does make a harness/kit for various years---

If you decide to wing it---black wires are grounds, pink and red hot(positive) some all the time, some ignition on run or accessory---
tell us what you have-----