Loss of Power on Acceleration (LKW)
| Cause | Correction |
|---|---|
| Intake rocker arms stuck in low Lift. (Vibrates at idle, park, neutral, 1st gear, 2nd gear, and on acceleration when commanded into high lift.) | Check intake rocker arm assembly to see if pin is stuck in extended position. Replace rocker arm if stuck. Refer to Intake Valve Rocker Arm Replacement (LKW) , Intake Valve Rocker Arm Replacement (LTG) . |
| Valve rocker arm oil control valve assembly failure in low lift. | Replace the valve rocker arm oil control valve assembly. Refer to Camshaft Cover Replacement (LTG) , Camshaft Cover Replacement (LKW) . |