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, Automatic.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. Any ideas?