1977 chevy pickup dash lights dont work - 1993 Buick Regal

Sounlike the pickup module in the HEI distributor is not working . Check the red wire for power and a good connection

Look at the head lite switch for a burned resistor.

The dash lights and parking lights are powered thru the headlight switch.
Do you have voltage on those circuits in and out of the switch ?

no relay. need to test and replace light switch

sounds like you have a bad flasher which is usually located near the steering column under the dash. check for ground on front left bulb. may have to replace light socket if ground is good.please leave comment.

if your dash lights don't work, it could be a fuse in the fuse panel located under the driverside dash board. be aware that if it is the fuse, you also wont have any tail lights either when you turn your lights on. Just brake lights.

Your dash needs to come out. These bulbs push into a plastic piece that "twists" into the back of the dash board. (About a 1/4 turn) Unless you can get at them from underneath, but I think it's to tight.

Check all fuses and all electrical grounds both in the engine compartment and in the dash. A bad ground (loose, corroded, etc) will cause all types of problems. Hope this fixes your problem.

All the diagrams for your corvette can be found here:

http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c1528008370b

Headlight wiring is towards the bottom of the page.

Hope this helps, have fun wrenching on that vette.