I've got a 1991 K5 that has a sticky gas pedal. It's not really sticky, but as you push down to accelerate, the pedal won't move, and then suddenly moves, so consequently the vehicle will then lunge forward. Does anybody know of a fix for this condition? I've tried the obvious WD-40 on the pedal pivot as well as both ends of the throttle cable and the throttle linkage under the hood. I'm hoping that this is a common problem that someone knows the fix for! Help!!!!!