GM Repair Problems? Ask GM Repair Expert Now.
Fix the P0301, and you'll fix the stabilty control warning at the same time.
Do believe rubbish about it could be an 80 amp fuse.
Let's fix the misfire first.
Now, either you have a faulty spark plug, cracked on installing it, or some other issue.
Can you remove no.1 and another plug, examine for abnormality then swap them to see if the code goes to the other cylinder?