Headlights dimming

I have a 200 Chevy Tahoe with fairly low mileage (52,000). Recently, I’ve noticed that the headlights dim for a brief moment when I use the turn signal or the electric windows. Any idea what might be causing this?

Weak battery and/or weak charging system.

Most parts places will test them both for free.

Of course, in a vehicle manufactured in 200 A.D. one can expect to replace an occasional part…

Wow, TSMB is right! I didn’t realize they build Tahoe’s back then. I bet it’s pretty hard to get parts for something that old.