Real quick Do I should stick with 190 or 200 even 250amp for my 2006 Silverado. Which is best one should I get one? I just want look for polish on alternator also. What cost it would be?

 

You don't need anything that extreme unless you've got a huge stereo or something

 

I use the 250amp. Been working great for awhile now. I use to have a big audio system but it definitly helps when all my efans are running etc.....

But like said, you wouldn't need anything that extreme unless needed.

http://www.powerbastards.com/default.asp

 

Oh. I just want chrome on it. The looks good. I wonder what our amp stock on alt? Mine 2006 Silverado 5.3

 

145 amp

 

Check your glove box for these codes. I'm only listing the GM RPO's for alternators 100 amp or higher here.
8A7, KG8 - 130 amp
8A3, KW2 - 124 amp
8A5, 8C0, K98, KG9 - 140 amp
8C6, KG3 - 145 amp
8C7, KG4, KG5 - 150 amp
8W5, 8X5, K61, K62, K65 - 105 amp
8Z3, 8Z4, K60 - 100 amp
K09 - 120 amp
K63 - 110 amp
KG7 - 125 amp
KW1 - 160 amp
KW3 - 135 amp
KW7 - 170 amp
KW9 - 190 amp
KYU - 200 amp