window motor draws a lot of power

When I roll down or up a window I can see my lights dim, and if I roll down all 4 at once, which I do everyday, it drains a lot, much much more than my 800W RMS amplifier does...wtf? Its always done it, just wondering if anyone else has this issue.

What year and engine?
I ask for engine because of the battery matched to it..

05' 5.3L crewcab

My two trucks also do it. Must be normal

Every vehicle with power windows that I've ever owned has done that. Since we're talking a few seconds of power drain, I don't think it's an issue.

wasnt really worried about the charging system, but if there was something making the motors work harder, i dont know. But this the first vehicle that ive seen do it, it cuts the headlights brightness by at least 25% at night, none of my friends car do it at all

Yup, mines the same, noticeable drop in light output and also lowers the voltmeter, doing that since brand new, and with only one power window being brought up or down. Normal

grease the window tracks to make the window slide easier...works on our work trucks

My 02' only does it when I stay on the button too long and bind up the motor after the window is already all the way up..

yea same here.. the light swill dim slightly when the windows are being raised or lowered but really dim when the button is held after the window is up.