The American SetGMC's One Model Year of Plaid Under the Hood
In 1963, GMC put plaid onto its factory order sheet, not as trim or upholstery but as a valve cover finish for its work trucks. The option ran for that single model year only. GMC never brought it back, and nothing like it has reappeared on a work truck since. For anyone hunting a 1963 GMC today, it is a small but genuine detail worth checking for before assuming the engine bay is all business.
With reporting from The Drive.