Alternator help

[NEVRL8T]

I replaced the alternator on my 2002 Chevy Silverado Z71 5.3 1500 p/u. Now my lights (exterior and interior) flicker or surge at idle. Everything looks to be in order. I replaced it with a 105 amp alternator which should be correct. Any ideas?

[03SlowZ06]

Higher output alt. No joke. They do it slightly from the factory and if you have the electronics package it is worse. I would go 120 amp. I think it may be a 120 stock actually.

[Y2Kvert4me]

Check the tightness/cleanliness of the battery terminals, and have the battery tested too.

The positive terminal on my 04 Silverado loves to gradually work it's way slightly loose about twice a year, and the dash lights flickering is always my first clue it's happened again.
It never "seems" loose, never not starts, and usually only takes ~1/4 turn to make it fully tight again, but each time I've retightened it has 100% eliminated the dimming dash lights issue.

Never once had this problem with the side battery connections loosening on the Vette, but it's gotten me about 5 times on the truck over the years.

[F40]

I think they don't even make any power at low Idle. I would put a volt meter on it to see where it starts to charge.