99 GTP cylinder 2 misfire code

I have a 99 3.8 supercharged GTP and at around 50 mph if you step on the gas it has a miss and the check engine light comes on. I had it pulled and it was cylinder 2 missfire. I have replaced the plugs with ac/delco platinum plugs, replaced the wires and the coil pack for #2 plug and I am still getting the miss. Any ideas on what it could be? My thought is maybe an injector?

Welcome to AF!!

I think your assessment of the problem is correct. The injector is probably bad and causing the cylinder to miss. The only other possibility would be the ignition module but doubtful!