I have a snow plow on my truck and yesterday was the first time i've really used it and i noticed that anytime i turn the blade or lift or lower my voltage goes down anyone else have this problem and would a strong alternator stop this?

Normal.....

Yeah, that pump is pulling a lot of current, pretty normal.

Before my 2004 2500hd i owned a 1500 chevy diesel and it also had a voltage draw when operating the plow. The plow system is hooked directly to one of the two batteries, therefore having a direct draw on voltage meter in insrument panel

What the Boys said :D

The battery is basically an accumulator. It carries the electrical load through the times that the alternator output is lower than the demand, then charges back up when engine speed is high enough to increase its output capability beyond what's being consumed.

My 6.0 gasser only has ONE 600cca battery (for now) you should see that guage drop! But then I do have the 145amp alt. charging it right back up pretty quick.

I would think the Diesels, having the bigger 770cca duals would'nt drop as bad, but I guess not. Most aftermarket batteries are 1000 cca's.

In the coming week or so, I'm planning on dual Red Top Optimas hooked direct in parallel with O gauge between them. This should help a lot.

You guys that have trouble with your lights dimming for what ever reason should try this. Its real common to do with us car audio nuts should work on plow trucks to.
http://forum.sounddomain.com/forum/ultimatebb.cgi?ubb=get_topic;f=5;t=007801

my dont drop any voltage if i go forward with plow operating, but when backing up and operating plow voltage drops by 2 or so, but that because i have 4 back up lights, and siren is going, heat, radio, high beams