No, if your truck is running fine with the alternator you have now with the 2 amps, you will be fine. Majority of HID kits use 35 Watts...it should say it right on the ballast. There are 55W HID kits available though.please confrim HID use less power the regular halogens correct?
which should mean i would not need a bigger alternator
when running them along with 2 amps in my truck?