The interior dash lights and exterior lights pulse when my 98 Chevy Silverado is running. I have had the battery checked and it is okay. Please Help.

Whats you alternator output???

Is that the first thing I should check? Won't AutoZone check that for me?
Thanks,
Dan

These are really high output alternators and when they start to fail, this is a good symptom. Might see the fluctuation in the voltage gauge?

You are correct, I have seen all of the gages jumping, pulsing. I will get it checked out and let you know.
Thanks