For those of you who may not already know, a common problem on Series 2 3.8 L engines are that the ICM (ignition control modules) can get overheated causing them to fail which results in multiple misfires (P0300). I have seen some heated debate (pun intended) about using thermal heat sink compound or not to use heat sink compound between the ICM and the metal bracket it bolts to. Here are my questions:

1. What is your take -- do you use thermal heat sink compound on the back of the ICM when installing or not?

2. If you think it is necessary do you have any tips on how to apply this?

3. Will the Heat sink compound prevent a ground between the ICM and metal bracket? Or is ground achieved through the wiring harness that plugs into the ICM?

Thanks for your input!

P.S. The car is a 2001 Pontiac grand prix GT 3.8 L