Coil clips and main harness connector are good.
Tested on a 2005 Deville DTS
Works on front or rear of engine FWD also left or right RWD & AWD
First gen coil connectors are purple and plug in vertically and 2nd gen plug in horizontally.
If you need the white epoxy top coils search item number: 162185300022
If you need black epoxy top coil wire harnesses search item number: 164254904368