I have a 1998 bonneville non supercharged only running on 4 cylinders.
I replaced the coil and still no spark at the coil. someone told me it could be the...
Ignition module? under the coils. Does sound like a possibility if so how hard is it to replace?

Thanks, Jon

Is it the same two cylinders that share a coil? If you have replaced the coil, and problem is still there, although possible you have another deal coil, it'* more likely the ICM is bad. The terminals that go in to the coil can go bad.

yes same coil. If ICM any links to how to replace?

make a note of where the wires go, take off the coils, take off icm and replace. just put everything back together with a bunch of dielectric grease

Not much to changing it. Like mentioned, make a not of where each coil goes. Leave plug wires on the coils. Remove each coil. Remove plug to ICM, and remove bolts holding it down. Don't over tighten anything, the treads are very thin and strip easy.

Thank you guys, bought new module from O'rielys $135, took me less than 1 1/2 hrs
car runs great!
Now I have to get the cat converter back on that was about to melt...

Good to hear it'* fixed.