What coil and Module???

[Morden]

How can I tell if my ignition module and coil are AC Delco or generic??
I can post pics of what I have if that helps.

 

[davidf]

If it's GM there should be a part no. on them. I believe my original module part no. started with 255xxxx.

 

[turbo nasty]

Coil Pack - Buick Grand National

 

[Morden]

If it's GM there should be a part no. on them. I believe my original module part no. started with 255xxxx.

Mine must be a generic then because I see no part numbers on them?
Reason I'm asking is because I'm trying to find a misfire.
I have the Caspers coil tester. When I test the unit it all seems to be Ok.
If it's not AC Delco then how will the tester react?

Thanks