K 1500 Truck 4WD V6-4.3L VIN W (1997)
5. Remove the pushrod.
6. Inspect the valve rocker arms and balls at their mating surfaces. There surfaces should be free from wear or other damage.
7. Inspect the valve rocker arm areas that contact the valve stems and the socket areas that contact the ends of the pushrods. These areas should be
free of damage and wear.
8. Inspect the pushrods for scoring or roughness.
9. Roll the pushrod on a flat surface in order to determine if it is bent. if the pushrod is bent, the rod will not roll freely. Replace the pushrod if
necessary.