Yes, most likely. There's a chance that it is something mechanical, but that's a slim chance and only if they have not been used in a LONG time.
If you're not familiar with these problems, I suggest chasing the vacuum lines to listen for a hissing sound either underhood or under dashboard. Remember that the headlight switch actually is an electrical switch AND vacuum valve in-one. Additionally, there is a little black knob (backup vacuum valve) directly under the dashboard in the event that the headlight switch valve doesn't raise the lights. If neither one raises them then you have either a leak or stuck diaphragm. Good luck! -ku2002
You can buy a vacuum troubleshooting guide from Zip Corvette to help you fix the issue.
I fixed it. There are rubber devices called witches hats that go on the vacuum canisters next to the headlights. You can either change the witches hats (quite a job) or just have the vacuum canisters you can get at Ecklers.
Or you can get them at Zip and save some money, here is a link to the headlight components http://www.zip-corvette.com/Zip/dept.asp?dept_id=887where is the diaphragm located on my 1981 Corvette?
Are Danny Devito and Joe Devito related?
How old is Danielle cohn?
40 thousandths equals how many hundredths?
Do mother birds really abandon their chicks if a human touches them?
Are Joe devito and Danny devito related?
Do octopus have nipples?
What is slappy phone number?
What does chongito mean in spanish?
Where is the origin of the Panama hat?
Have you ever crashed a wedding or had your wedding crashed, if so what happened?
How many times did Joe Biden run for president?
What is the world’s oldest soft drink?
How many novels did Charles Dickens write?
What do the colors on America's flag mean?
How did Harry Houdini come up with his stage name?
What is modal fabric?
What does y2m mean in knitting?
What is distinction percentage in ICSE?
BA-28 which is a recommended water-skiing safety practice?
What happened to Simon o'brien's eye?
What is the sequence of the mRNA made from the gene TTACAGGTCCCA?
What is your primary responsibility when other boats are in your area?
What is Alan Hansen doing now?