1999 GMC Safari has a sticky gas pedal once it has been depressed its fine. It was not the cables What do you think?

Answer 1

To be honest my friend had the same problem and it was the floor mat

Answer 2, Additional Input

The floor mat in answer 1 is possible, but there are other possibilities.

If I understand the question, the accelerator pedal feels like it is "stuck" when first applying pressure, then once it has "let go," or "breaks loose," it operates freely through the rest of its travel arc.

You also say "it was not the cables." I don't know how you know that, but assuming the cables are not binding, another possible cause is a misalignment where the cable from the accelerator pedal "goes into," and attaches to the carburetor or throttle body.

Also, the binding could be in the pivot for the accelerator pedal itself. This could be the result of a "burr" or misalignment of the shaft to the pivot bracket.

These are the possibilities I can think of, but there are probably a few others someone else can think of.

Answer 3- If the cable is not kinked or damaged the cause of the problem is excess carbon buildup in the throttle bore or intake,underneath the throttle plate. When the pedal is depressed,the cable actuates the throttle plate,and sticks on the built up carbon layer in the throttle bore which restricts free movemment of the plate. Remove throttle body from top of engine and clean this buildup from under the throttle plate and reinstall. This will restore normal operation of throttle plate.

The sticky pedal on my 2000 Safari was caused by the throttle plate wearing into the throttle body housing found this after I changed the cable I sanded the burr off the throttle plate lubed the cross shaft and return spring and it never stuck again.