I have a 2004 Buick Rainier (6 cyllinder). I just found out the 4th bank ignition coil is bad. Seems easy enough just looking at it (I just replaced a few of the spark plugs a few nights ago with no problem). How exactly do I replace the coil? It seems as easy as detaching the coil, and swapping it out with a new one. Is the correct?
You've got one coil per spark plug, on or near the plug. It should be a plug 'n chug operation, yes, just one screw/bolt securing the coil. There's the usual ton of threads to sort through over at trailvoy.com.