R 2500 P/U 2WD V8-454 7.4L (1988)
Valve Clearance: Specifications
ROCKER ARM AND PUSHROD ADJUSTMENT
^
Adjust Rocker Arm to Zero lash plus 3/4 additional turn.
GMC Workshop Service and Repair Manuals
Valve Clearance|Specifications|Page 750 >
< Compression Check|Specifications
Page 1
