Is there a fuse for the headlights on a 88 k2500, I can't find one. Thanks, khwils

There is a fuse. It is right behind the e-brake pedal. Check the owners manual for the fuse number (If you have it), otherwise just pull all the fuses.

Headlights being out could also be a bad switch (do the parking lights come on in the headlight position?), a loose connection, or the bulbs could be burned out (do the high beams work?)

also, when i bought my 73 cheyenne c-10, the headlights both quit on me and it ended up being excessive corrosion on the contacts that are inside the plug for each headlight. i popped em out and used some sand paper to get the corrosion off and they were good as new and worked fine after that