alternator

i want to upgrade my alternator. where could i buy a 200 amp alternator for a 98 5.7L Tahoe

I would suggest a alternator/starter rebuild shop, if you have a good one in your area. They should have what you need in new or reman.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=38638&item=2466774735

I just bought a new one for my 97. I've had a 135 amp from him on my 77 for a couple of years now. No complaints at all.