Actually it doesn't appear to be the pedal itself.
The truck is a 2000 Chevrolet Silverado pickup with a 5.3 liter V-8,
The accelerator sticks intermittently. Sometimes right after I've started
and other times after a bit of time. I've recently noticed, that it only
occurs when the truck is actually running. If the pedal sticks and I can
stop and turn the truck off, the pedal is free again. I'm guessing there
is some kind of "assist" (vacuum, electrical or maybe hydraulic) that is
actually sticking. I've checked the cable and it seems to be free. Of
course, when I want it to stick and check under the hood, it won't.